Teleportation! Seems like it would be a very useful power (immediate ability to travel anywhere) and it is less likely to get me into trouble than any other powers I can think of at the moment.
I DEFINITELY do not want the ability to read minds. I've got enough glimpses into the minds of others.
If I really knew everything they were thinking I'd probably have to live on my own island.
none of it would (probably) make any sense to you, since everyone thinks in their own way... mostly jibberish and incomplete thoughts, unless they were focused on something...
i would choose magneto's powers... metal manipulation seems to be the best for our world...