Balance: There always seems to be one or two characters who can overwhelm most other characters without much timing or skill at all in the game...

Variation: Between characters, ones that might focus on empowering him/herself/allies(?) before attacking... for optimal effectiveness.

Pretty Visuals: I'd love a game that would feel like you're watching an epic spectacular Action Scene.

Lifebars: I like my Lifebars xD... I hate the whole submission KD thing that Wrestling games have xDDD

Can't think about anything else at the moment... a little busy. :3