Once someone asked me for some powers their superheros could use in the book this person was writing. While I did not have great answers at time the question was asked, in case the need should arise again, here's some ideas:
1. Your superhero could recall everything that has ever happened to him. This is actually a brain defect that only twenty people are known to have.
2. All the words that the superhero has ever spoken appears on their hands (Or all the words they've every heard).
3. Your superhero could mind control one other human on the planet, who might be living in Australia. Here's some twists:
A. The superhero could mind control that one person, but could not control themselves.
B. The person they can control is dead, so technically your superhero is bringing someone back to life.
4. Your superhero's personality is either completely left brained or completely right brained and refuses to see things any other way:
Haha, please don't ponder the state of my mind for thinking these up...I think I'm sane.