I suppose mine would technically be 'Physical'. Despite all the awesome powers, I'd love to have basically indestructible skin, and be completely immovable if I wanted; sort of like the Blob, but not fat.
I mean, I could stand in front of a train and not only would I be totally unharmed, but the train would crumple and pile-up into my body, and I wouldn't move an inch.
I think this power came from the fact that I really hate taking long lift-rides, and have always thought it'd be so much more entertaining the hurl myself out a window Dante-style.
EDIT - Actually, since Alex Mercer and Bioshock-dude can harden their skin by re-arranging their genetics, I'd be torn between being an indestructible, immovable, immortal (who can kill himself if bored), and a Shapeshifter who is indestructible but can transform and yet still be immortal..