I think that the superhero-as-metaphor involves a superhero being some sort of intellectual, emotional, or other such concept writ large. But I don't know that it's a necessary part of the appeal that the superhero be superior.
Kurt BusiekThe Hulk is rage personified, just, "I don't like something. Break it." And that's a great concept for a seven- or eight-year-old.
Kurt BusiekI don't view Twitter as a promotional tool but as a really, really, really cool cocktail party.
Kurt Busiek