What you're saying to me is that fighting games don't retain interest long enough because once people learn a character they get bored. That doesn't seem like good design to me.
IMO. Then again I sold Marvel vs. Capcom 3, but that's because no one else would play with me, not because I was bored of the characters.
IMO. Then again I sold Marvel vs. Capcom 3, but that's because no one else would play with me, not because I was bored of the characters.