Welcome to Best's Wild Ride! This is a modpack for version 1.12.2, and contains many mods that don't exist in newer versions. Prepare for a wild ride of mods you haven't seen in a while, or maybe ever!

Your options are numerous, and I'll list a few of them below:

Forge your own tools with Tinker's Construct
Become a powerful Wizard with Electroblob's Wizardry and various submods for it
Create powerful technology with Mekanism
Store your growing hoard of items with Applied Energistics 2
Expand your skills with Level Up! Reloaded and Reskillable
Become more than human with Robotic Parts and Matter Overdrive
Explore new structures with AtomicStryker's Battle Towers and Roguelike Dungeons
Slay great beasts with Mowzie's Mobs and Ice and Fire, both of which have had their bosses buffed!
Explore the Solar System with Galacticraft and Extra Planets

But if you prefer a more relaxing life, there's some options for that as well:

Decorate your home with MrCrayfish's Furniture
Become a farmer with Pam's Harvestcraft
Build a kitchen with Cooking for Blockheads
Find new biomes to live in with Biomes O' Plenty
Become a beekeeper with Forestry
Get a loyal dog with Doggy Talents, or a lovely cat with Simply Cats
Manage improved villages with Tektopia

Lastly, the pack contains many mods to improve performance for both client and server.

You should allocate 6GB of RAM to your Client, and if you run a server, also give it 6GB of RAM.