Fly for sure.
I do track, and the thing i love most about sprinting (besides winning,
lol) is this incredible feeling of weightlessness i get at about the 50 metre mark. By the time i finish i can never even feel my feet hitting the ground anymore, and it's the most amazing experience every time i race. Actually being able to fly has got to evoke a feeling that's about a trillion times more powerful; and that's something i can't even begin to fathom.
i don't usually post... actually come to think of it i've never posted... not on this message board anyway, although i do read what's on here almost daily i just don't comment...
sorry, i'm getting off topic, all i wanted to say is that the only thing i can think of that would be cooler than flying would be having telekenetic powers.