Invisibility. This would be more useful. Flying is fun, but really, I can find my own transportation.
The only problem with Invisibility is that I simply wouldn't trust myself with it. I would do SO many things with it that I would regret.
Invisibility. I'd spy on people all day long. Knowledge is power! :p
By the way I'm studying materials science, and some of us can make invisibility cloaks.
Be jealous :p
You are a super-twit who can release dumb questions at will while navel gazing.
(I see London, I see France...)
Depends does the invisibility cover my heat signature, and apply to my clothes.
Also would flight wear me out a lot.
Flight. Cause I want it.