I mean, first of all, let me say whichever superhero first came up with the idea of wearing a cape, he wasn't really onto anything good. The number of times I'm treading on that damn thing or I throw a punch and it ends up covering my whole head. It's really not practical.
I think that when you're writing fiction what you're doing is reflecting life as you see it, and putting down how you think and how other people think, and the sort of confusions that you don't normally like to admit to.
As the lead of a movie, you really set the tone off-camera as well, and that's a really big responsibility.