The powers I'd want in real life are not necessarily the same as the ones I'd want in a combat-heavy situation. I'd certainly enjoy Electrical Blast or Electrical Melee, but it wouldn't really be applicable to day-to-day living.
So I think I'd go with Willpower. High pain tolerance, lots of endurance, fast healing, heightened senses, and resistance to injury? Yeah, sign me up.
(If I could have TWO powersets, though... then, yeah, Electrical Melee/Willpower. Or, if we don't have to follow AT rules, Electrical Blast/Willpower)
Really, though, most days I just wish I had Inherent Fitness.