I realized I don't have anything to do for relaxation that I can just turn my brain off, so I downloaded Quantum Freedom and added some extra mods. Doing that ended up breaking it, so I mulled over the mod list and added the fun ones, along with some extras.
Also, the pack icon is a 64x64 picture of a creature called an Olm. They're neat.
It's very kitchen sink, but I have a few things that were higher priority:
I added as many mods for new biomes and structures as I could find. All of YUNG's things are here, along with BetterNether and BetterEnd, Biome Makeover, Oh The Biomes You'll Go, Promenade, Mo' Structures, Traverse, and so many more.
There's Tech Reborn and its addons, Industrial Revolution, Modern Industrialization, Space Factory, Create and its addons, and Ad Astra. Also AE2, for storage, plus Modern Dynamics for extra transport options.
There's the mod itself, as well as Origins++, Extra Origins, Mob Origins, and Origins: Umbrella. As well as this, there's a mod for create compatibility so if you wanna make a datapack based origin with that, you can.
There's botania (and AE2 integration with botania), Spectrum, Miskatonic Mysteries, Arcanus, and Hex Casting.
There's not just ComputerCraft:Restitched with compatibilities, but also a Zachtronics inspired one called TIS-3D. I would've added a bunch of compatibility mods for it if they weren't forge exclusive.
There's Simple Voice Chat and Claims, but Voice Chat also affects the world so watch out.
We've got Xaero's Minimap and Worldmap, EMI with plenty of compatibility plugins, Appleskin, Effective, and plenty more.
There's bombs via Blast, frogs from Pick Your Poison, and some other little additions.
The above list wasn't really exhaustive, but this pack has both an up to date Packwiz-based git repo and an old Moddermore page.
For some reason, it doesn't work on servers easily. I have no clue why. I want to get that fixed, but I'm tired as hell all the dang time.

A bunch of mods I like, just because why not