Alro

Uncraftable item, spawns a mob that dies in one hit and drops seeds, but small chance to drop three swords which deal like 10x the damage of vanilla swords.

I watch the pearl go across and then the dispenser moves and I'm like "heheha funny funny mod" and I clap my hands and stomp my feet, and then my big serious adult brain starts whirring like a propeller being powered by a jet engine and then I make a super complex redstone contraption designed around moving the dispenser between multiple places, I build a computer in minecraft, then run minecraft on that computer with this mod and do it again, recursively, going forever, it gains processing power as it goes ever deeper, I run the universe on my computer, I am God! I was God all along! AAHAHAHHAHAHA oh wait no sorry I just realized it didn't work. Dagnabbit, there isn't a single thing I can do with this that I can't just do with normal redstone. But maybe that's the point? Not of the mod, no, of life. Life is something simple and stupid that we've overcomplicated and pretend we're using for something, but it's all just a sick joke. I used to think life was a tragedy, but now I realize that it's a comedy. That's right folks, Ender Pearling Dispensers sent me on a Joker arc, because, honestly - listen close - come closer - closer - CLOSER!!! - I have no idea how to make a real review of this mod. What do you want me to say? It works. I put this in my modpack, and I play that modpack a lot. I really do have over 1000 hours played with this mod, and you know, for some of that, I even remembered that I had it. What would you have me do, not play with this mod? Insanity. A mod doesn't need to do anything meaningful to be good, someday, if people actually play my modpack, they're gonna stumble upon this mod by accident, and shoot an ender pearl out of a dispenser, and they are going to smile when it jumps to the spot where that landed. That's what all this is about, ultimately. That smile. I've played deeply complex mods that took their creators decades of work and never smiled, but that's what we're here for, is it not? To look upon this game, and feel the darkness that clouds our hearts every moment of every day pushed back, just a little. Nothing is fixed, nothing is better, I am very lonely and I am scared all the time, but when I see that pearl launch the dispenser across the room, I'm not thinking about how terrified I am of mortality, or all the things denied me by this transient existence. I am like "heheha funny funny mod" and clap my hands.

You should clap your hands too.

For a dimension mod this simple, Splintered Floorboards is a surprisingly unique and well-realized concept.
That said, for a simple mod, I also encountered a ton of bugs, like the dimension's mobs spawning in the overworld, and a crash when mousing over certain mod items and pressing shift.
To reflect the mod creator's wishes, I'll keep discussion of what the mod actually does to a spoiler tag:
Create a Splinter and Bone, light a wooden portal, and go to a dimension that looks similar to the overworld, but for a yellow fog that prevents you from seeing far, and the fact that all blocks have been replaces with various types of wooden planks. Plank trees, plank caves, etc. Wooden mannequins carrying unique weapons stalk the landscape, they look just like you, but wood. As you search around, you can find houses built by other visitors, filled with signs that ask questions like "is this all there is? wood forever?" boarded-up sections of house, and even a door to mid-air ominously labeled "jump." It's a really unique and interesting atmosphere, and I feel like if there was a bit more to do in the dimension, (I'd love to see an equivalent to ores underground that require higher levels of axe,) and the mod worked a little better, this would actually be a really cool little dimension mod.

Force-feeding other players food that they don't want is such a funny concept, but this isn't done programmatically, so only vanilla foods can be used. It's a little funny to be able to do this with spider eyes or rotten flesh, but any big modpack is going to have a lot of food options that don't work with this, and I dream of the day when pvp becomes about feeding eachother Minestrappolation Basket Ball Spaghetti.

I love this mod. The painting, that it advertises as its main feature, is only a small part of that.

The Broom is an awesome item, a relatively cheap tool held in the offhand that pulls items to you when you right-click. Unlike item magnets, you can actually hang out in your base with another player and not steal the drops from any block they break, or drop items that you don't want without picking them up again, it's super easy to use and understand, it makes a ton of sense from a lore perspective, can't appreciate the Paniclecraft Broom enough.

The Advanced Sign is another top-tier item, allowing you to rotate the sign on any axis, decide whether it should be directly on the block you put it on, or use a stick, write with colors and bold text, change text size, number of lines, and much more.

Unfortunately, there's an issue with multiplayer servers that causes a crash on launch. I used the Malek's Infinity Gauntlet mod to disable the paint remover, and fixed the issue, you might be able to do something from the configs, but crashing when used on a server is a really tragic issue for a mod so focused around multiplayer to have. The issue is fixable, and the mod is worth it, but you should not need to do this.

Does what it says on the tin, and does it well. If you've ever wanted to store your items in a cow, have I got the mod for you!

Incredibly helpful, all modpacks should have this or something like it, but using it in my modpack I learned that there are other keyboard layouts besides QWERTY that some users use, which the mod does not work with.
Functions for every keyboard layout used anywhere in the world would be a lot to ask, I'm pretty satisfied with the mod as it is, I highly recommend that every pack use Keyboard Wizard, but packmakers should be aware that it won't work for every player, and you cannot remove Controlling just because you have Keyboard Wizard.

Cut any block into 1 pixel pieces, easily assemble those into shapes en masse or individually, rotate them, color them, configure them to move with redstone, copy and paste them, mix and match them, all also works with liquids, all survival accessible, all while also having wildly better performance than the competition. It's hard to think of anything you could want out of this kind of mod that Little Tiles doesn't cover.
Does have occasional rendering issues, where tiles become invisible, which isn't a major issue, but for a mod all about building visually appealing constructions, it's pretty important that you can actually see those constructs.

Is't prtety ufesul ot hvae a mcuh ftesar wya ot gorw suagr cnae. I htae wiating fro tihngs adn tihs mdo relaly seepds pu teh pocress fo gorwing palnts taht requrie snad udnerneath, epsecilaly wehn yuo ulitize resdtone.🙃

To me, the best representation of Sevtech is that Endermen begin spawning after you already have to have built a smeltery in the game's progression, and have been tweaked to drop ender dust, rather than ender pearls. Ender dust can be put into a smeltery to melt into molten enter, which can then be cast into an ender pearl.
Why?
For what purpose?
It would have been easier for the developer not to change the enderman's drop.
It would have been easier for the player to not have to do these extra steps.
It would not change progression if endermen dropped ender pearls.
Why would anyone have done this?
What thoughts must have been going through the mind of Sevtech's creator to have ended up wasting the player's time like this for actually no reason?

Too few modpacks have a clear and singular vision the way that Sevtech does - It's beautiful, I love to see it, I hope more modpacks aspire to this level, and I hope that the singular vision they have is better.

One thing that stands out, with Sevtech, is just how little it cares about your time. Darkosto really looked at the thing in vanilla where you put your stuff in the Furnace and go read a book or something while your computer's running and said "that's amazing, I want that!"
Because progression is largely in a straight line, rather than giving you several things to do at once, I often found myself in the position of, say, needing Buffalo teeth to make the next piece of tech, and waiting around for my buffalo to breed, then grow up, then breed again, until I could afford to lose a few, or starting up a coke oven and needing two stacks of steel or three arc furnace electrodes to do the next thing in the list, so just having to wait for it to slowly process stacks of coal.
The Geolosys ore clusters are an interesting feature, but because they replace vanilla ores, rather than supplementing them, this was a minecraft where you don't really go mining, which I can't say is really what I come to MINEcraft for.
Now, these things were not what made me give up the pack, that was forcing me to interact with Pneumaticraft, even I have limits, but make no mistake - there was good stuff on the way there.

The amount of work put into this pack is mind-blowing, so much stuff that no other pack would dare to tweak is configured, even mods that have practically zero actual documentation, which I don't understand how Sev themself managed to configure, but looking in this pack's configs for examples is pretty much the only way that other modpacks make use of these mods.
Sevtech is supremely annoying in its insistence that you deal with mods like Pneumaticraft, Abyssalcraft, and Primalcore, it redesigns huge swaths of the game into something unified and interesting, with all kinds of reworked recipes, and yet still suffers from that kitchen-sink pack thing where non-vanilla resources are worthless. Primalcore fills the nether and end with plant fibers and clay variants, and they're not good for anything whatsoever.

Idk where to fit into the review that Primaltech is really cool and I love using it.

In spite of everything, Sevtech is a really impressive showcase of what modded MC can be and do, and I love to feel like I'm experiencing a creative person's unfiltered vision, even if that vision is practically the opposite of what my own would be.