I'd assume that most would pick superpowers or sports or sex or something. I'd wish myself to be, I dunno, the world's best dog walker or something. Or best massager of old peoples' feet. I'd be praised for my irreverence and humility, and held up as an example of selfless choices. Or I'd charge a ridiculous amount to walk dogs and rub feet and become rich, safe in the knowledge that no one else would be stupid enough to wish for those things.
haermm
I think, given the circumstances and whatnot, I'd like to be the best at driving. My girlfriend has no faith in me, though it's all because she's been driving a bit longer than I, and quite honestly, I'm getting a bit sick of the jokes...
Well, driving or I'd like to be known as making the world's first cell phone to never run out of airtime or battery life... ever...