For me, time is the best power. I have often wished to take back something I did, or slow down time so I would have more time to complete something. Maybe I could go forward in time so I wouldn't need to face a certain problem. Either way, time is the best.
Mind reading of course! It has always amused me like how our brain works and so yeah! Why not? x3 And, another: That terrific power to be invisible! :3
The power to transport myself to any place and/or time, and not effect anyone I left behind.
Fey he seemed, or the battle-fury of his fathers ran like new fire in his veins, and he was borne up on Snowmane like a god of old, even as Oromë the Great in the battle of the Valar when the world was young. - The Lord of the Rings: Return of the King
If I had a superpower, I would want it to be flight. ^_^ After watching the Alfheim arc of Sword Art Online (for those who don't know, Alfheim Online is a fictional virtual reality video game where you're a fairy with awesome looking wings), I realized how neat the experience would be. If I couldn't have that power, I would settle for the ability to shapeshift or manipulate darkness. ^_^