Fan of the Bat
I'm not a huge fan of Batman, though I do like him for many of the same reasons I like Cap - he's just a dude who slugs it out with supers. No powers - just gumption and gadgets.
But this video gives me some hope that Arkham Asylum is going to be really good. Bioshock good.
That's some creepy stuff right there. The gameplay videos are pretty darn cool, too.