I've previously said that the real world-ender omega level power in the x-men universe would be a kid with ADHD who constantly & unpredictably generates new powers where the trick is the powers only last as long as the novelty does, but I'd also add 1 constant/recurrent power: The Worst Time Travel.
A really beneficial power for an ADHD-er would be time travel back 5 minutes to see where you set that thing down that you now can't find anywhere, or to recoup the time wasted looking for it.
