It depends on the type of game. I think the only type of hero I can't really stand is the type that does good for the sake of doing good. They just always come off flat to me and unrealistic, I need a bit more conflict with the character and its hard to make them interesting if they are just being self-righteous all the time. It's why I don't really like good/evil choice systems cause they lack a good middle ground and instead I'm either a Silver Age super hero or some stereotypical super nazi with no redeeming quality.