Invisibility. I would be able to steal information, money, art, just about anything. I could use this power to expose government secrets and corruption, find out what corporations are doing and expose them, and sneak into a wide variety of interesting places.
I have all 3 anyway.<br />
My superpower would be sanity ;)
invisible so you can bet up bad guys.
invisble. So that I can unearth some part of corruption...
Fly, the I wouldn't want to be invisible, I'd only end up finding out things that might upset me, although I might use it to pop into a few vivisection labs, freak everyone out as the animals fly out the door. :)
Seriously, you give me three powers and then you take two away? That's cold.<br />
In any case, I'd choose TK. It has the most practical applications.
Telekinesis. It can lead to the other two eventually.