I think I'm with hugemind(did I spell that right?) on this one. (here via spnnewsletter as well)

To take up a cause this big, people have got to be personally involved somehow. Motivated. There are few people that will go for a cause without anything else urging them other than what's right, and we find it harder to identify with them, I think.

Someone mentioned something about Superman being known, but Batman being liked best. It's not just pity factor (oh poor Bruce lost his parents etc). I think it's the fact that even if he may not be the best of persons, or be just as regular as anyone, he'll fight against his own darkness, his own nature and the darkness around him.

Superman is portrayed better and nicer and shinier than all, so fighting the good fight comes natural to him. Batman is not as shiny. He's darker, and he still fights the good fight.

(one of the reasons, I think, why watching Angel's quest was more interesting than Buffy's as far as I'm concerned.)

So hey. Shiny people are expected to be shiny. Normal people pushed over the edge are more fun to watch.

(In my mind there it sounded a lot more coherent really. *shrugs*)