If I were to have a superpower, it would be the ability to fly. I had always dreamed of being able to do so since I was younger (and had even tried several techniques to attempt this such as using large sheets or kites in a parachuting fashion or wearing types of capes) since I saw it as a wonderous thing to do with great freedom.
Someday, it may be possible to invent some sort of device that can sucessfully initiate a flight of able-movement and/or to imitate a flying animal. For now, only gliding objects (including the "full-body suit fallers", which I've seen video footage and a photo of) are the best to get this sort of experience.