Just wanted to put these recommendations on paper, even though I've already discussed it elsewhere.
1:
Binnie's Mods. More bees, more trees, and botany. Really, it's the bees + genetics thing that's important. (I don't know if others show interest in this mod, though.)
2:
Extra Utilities. Just generally useful stuff. Low level early-game energy generation, drums (massive liquid storage), and an assortment of useful miscellaneous blocks (sound muffling, bag of holding, etc).
3:
Xeno's Reliquary. Honestly, I just want this for a few specific items. Probably not important. Glowing bread is pretty neat too, I guess.