I'd wish for Telekinesis. I love the idea of moving objects and other things with the power of my mind, being able to levitate myself in the air and fly around has to be really cool, plus I'd be a powerful individual. I'd most likely use it for fame and fortune, showing off what I could do. I'd also use it to protect the people I love, and to help the occasional bystander. 

It was hard to choose just one power ;-;