I know I start new worlds with different lists of mods more often than some players here, but I guess that's part of the fun of Minecraft for me. I have been playing with PFAA Geologica for a while, but some GregTech materials are actually harder to find when using it than when using GregTech's default worldgen, and I'm missing the overworld small ores.
I've got a 32GB memory kit on the way (hoping it doesn't end up in Laurel, Mississippi instead ), and I've switched to using mostly Soartex 64x textures (except for IC2 crops - I don't like what they did to the stickreed, melon, and pumpkin crop textures, so I've mixed in some Sphax textures for those), so I don't need to keep my mod list as short as when I was trying to use 128x and 256x textures. Once it gets here, I think I'll start a new world with some different mods. However, I haven't found a modpack I like - many of them include mods I'd prefer to avoid, like EnderIO or Doom Like Dungeons, but fail to include mods I want, like Control Pack and Mouse Tweaks. I also don't want to spend a lot of time building Minetweaker scripts to balance things - half an hour to an hour is okay, but not much longer than that. Also, I'm playing single-player in peaceful mode.
Here's the list I'm considering this time:
Applied Energistics 2
Batty's Coordinates Plus for Forge
BedrockLayer
Better Chests
Buildcraft
Carpenter's Blocks
ChickenShed
ComputerCraft
Control Pack
Custom Mob Drops
Electro-Magic Tools (fewizz fork)
Extra Cells
Forestry
FastLeafDecay
GalacticGreg
Galacticraft
Gendustry
Gregtech 5.08
GTTweaker
Hunger Strike
IC2 Crop NEI Plugin
IndustrialCraft 2 Experimental
Inventory Tweaks
Jabba
Magic Bees
Mariculture
Minetweaker
Mouse Tweaks
NEI Addons
NEI Integration
Not Enough Items
Nuclear Control
OpenComputers
Optifine
Pam's HarvestCraft
Railcraft
Steve's Carts
Thaumcraft
Thaumic Energistics
Thaumic Horizons
Waila
Waila Plugins
Wawla
WorldStateCheckpoints
As usual, please let me know if there are significant balance or compatibility issues with those mods that I might not have noticed, or if there are other mods that might be worth adding. (existence of Soartex textures for a mod, or at least higher-than-16x textures that look good alongside Soartex textures is a plus)