I'm using crops from the beginning of every world. It is the most reliable source of dies (and I think only one with ink sac without diving, except maybe UU), which goes great with forestry stained glass and RP cables. With forestry and pumpkins you can get a lot of seed oil really fast, one standard farm plot (80 spaces) with pumpkin seeds give you about 2.5 stacks of pumpkins. Melons, which are quite easily bred from 2 wheats give you great early game food source. Coffee is very powerful, specially if you drink a few. Crops were also one of the ways to have netherwart in the overworld prior to 1.3.2 (similar with cocoa beans, but forestry provided heroic bees). In FTB pumpkins were a powerful early source of EMC. Current system needs some rework (specially with pumpkins/melons, they give to much from normal seeds) and more crops, but overall it is fun in normal game play. I can't say much about beer, because I didn't play with it a lot.
Edit: However, automatic brewing would be great (not crop collection, if this is too bothersome there is OP forestry addon for this).