Obviously we would all like to be able to fly or teleport and such, but what less exciting power would you want to have.
For me, it's waking up at the time I want to. Of course I always get up in time to get to work, but whenever i plan to get up earlier to go to the gym, practice a presentation, or run an errand, I can never make myself get up early. I wish I could just say I'm getting up at 6am tomorrow and actually do it.