Come on, everybody wants super-powers! And all the good heroes (Okay, okay, other than Batman) have them! What super power would you want, and why? Is there an existing super with that power? Who is it?
For me, I'd have to say the Green Lantern's power is pretty unbelievably cool. You can make anything you can imagine with that ring. Sure, you have to take an oath to uphold justice and good in the universe, but you still can make ANYTHING. That's totally worth it.
If the Green Lantern Corps won't accept me (and I don't blame 'em) I'd have to say Constantine's powers are amazing. He's not technically a super hero, and is sort of rocking that anti-hero vibe. Basically Constantine's gimmick is that he can talk, summon, bind, and deal with demons. That's super cool to me, particularly as a fan of fiendish mythology.
Adventure stories! They can be fantasy, modern, sci-fi, all kinds! Give me some good world travel stories and I'm all over it! I also enjoy romance stories and even though I tend to play females I love playing gay men.