You're all going to hate me, but when i was in japan last october, i probably dropped about $10 into playing this game. I'll tell you right now, it's amazing.
Each character behaves completely differently. They have different fighting styles, different weapons, and even moves that are kind similar (your standard projectile, for example) each have their quirks.
Plus, there are so many characters, you're bound to find one you love.
and obviously, the are is amazing/animation.
There is a story, too, but my kanji reading skills aren't great, so i don't know what it is.