Updating now...
Flash is definitely the most fun character in this game.
His "Speed Force" skill is the best.
340% faster than normal =p
It's really fun =]

I've been fanatic about this game since I played it for the first time.
It's so awesome! It's a great co-op game... I get to play with my friends all the time.
It's boring to play alone though.

One of the best characters is Zatanna: she has cure spell, time shift which makes your enemies freeze for a few seconds, some spell that changes your enemies into little bunnies too...

Anyway... I really enjoyed this game and I won't stop playing it for a while. =]