I could go with invisibility, since I'm halfway there already
. Invulnerability would be nice, too. Flight? Not unless I also had invulnerability (it's not the fall that kills you; it's that sudden stop at the end).
I might go for something like the ability to control my age: I'd be able to live as long as I wanted to, experience all stages of life, and then pretty much stay at whatever age I deemed best for as long as I wanted to, changing whenever I deemed it necessary. I wouldn't want immortality, because humanity can get pretty boring, and if I just continued aging, what would I look like in a thousand years? Eternal youth isn't necessarily the way to go, either; sometimes, you need to be old.
Either that, or something similar to Patient7. Instead of stopping time (which would be cool), I'd settle for being a butt ventriloquist: the ability to throw your farts (complete with odor, of course). That way, you'd have someone to blame when you let loose with a huge ripper--the prim little neatnik on the other side of the room. Or you could throw one so that it came out of the mouth of some politician
. Okay, I'm getting gross again; I'll stop and go back into invisibility...
