This game is sticking with Sora as the main character all the way. We might be able to use Riku or Kairi at some point (Escape mission or Hold The Line often sees such situation), but Sora's what we're sticking with.
I think Drive is good enough. Although Master Form suks. And Wisdom is useless.
Anti Form is quick though, Xigbar can't aim me
Most peoples battle reports would read: Most used drive form: Valor (Brave)
Wisdom sucks cause you have to defeat a heartless to get one EXP, and the attack is pathetic, and magic runs out within about 10 seconds.
Master is annoying for leveling up, but the rewarded ability is funnnnn.