*cough* This is a horribly difficult question, as I don't think given much thought to this kinda stuff (nor even what I've read, when, and who was in it)...but, uh...
On GA: that one guy..from that one story I read that one time...haha. Jk. Rory from DomLuka's Desert Dropping. Mostly cause it's the only story that comes to mind with a character who's life isn't...a bit wild there while exciting enough. Poor kid, though, assuming mine.
Sci-fi: hmm...I've always liked Ender's Game, but I can't say I want the responsibility those kids are stuck with. I recall reading a short story about a guy who's consciousness gets uploaded into a PC. Definitely that guy. Immortality and infinite Internet, here I come.
Comic books: weird section. Uh...that one kid that Batman gave something to some movie? I think. Maybe. I dunno. Simple life, in any case. Also cause Batman. (I don't read comic books, okay...don't judge me. ). Although, if web comics qualify, Martin from Questionable Content's life isn't that horrible.
My own: hmm...kinda difficult...a lonely life though with unlimited power over the world around me...or a popular (liberated) king of a world power, upset by the stress that comes with said...or...a kid governor of an interstellar colony of a hyperpower surrounded by intelligent monkeys.... I'd say that last one, cause humorous daily life...even if it is largely at my expense.
(Long answers for someone who doesn't give much thought to this kinda stuff, huh?)
Next question: what's the funniest thing that's ever happened to you?