I love the MindCrack pack, but I have these mods disabled:
ComputerCraft, looks OP as hell, to me. I also prefer to do stuff mechanically instead of creating a magic box that does all the work.
EnderStorage, again OP as hell. I already dislike the concept of vanilla Ender Chests, let alone this one.
Factorization, I think Barrels are OP and they are about the only good thing about this mod.
IC2NuclearControl, might add it in the future, if I ever bother to mess around with Nuclear stuff.
miscperipherals, see ComputerCraft.
MFFS, I don't hate Force Fields, I just don't like the way this mod implements them.
AdvancedSolarPanels, most OP mod in the game when it comes to power generation.
Obsidiplates, not a huge dislike, but I don't like them enough to put them in my game either. Also, they look terrible, just like Obsidian...
Thaumcraft, general dislike to magic stuff, if it ever sparks my interest I might mess around with it though.
Twilightforest, same as Thaumcraft.
There are more mods that I consider OP, but generally they also have parts that I like enough to include them in my game. I might be a bit picky, but personally I don't see the point of playing survival with mods if they're just going to give you cheats wrapped up in a fancy paper. For me that little more effort I now need to put into automating stuff and getting my tools is what makes survival with mods still feel like survival to me.