Re: ONE power: what do you do with it?
One power, eh? Here's some thoughts. Not necessarily in order:
1) Extra-dimensional travel, to anywhere and anywhen. With infninite worlds available, I find the right one, and then I can acquire other abilities, like Immortality. Then the possibilities for exploration and adventure are limitelss. Of course, I'd need to have the ability to take others with me, or it will get mighty lonely.
2) Total Life Support. Who wouldn't want to be ageless and immune to poisons and diseases?
3) Regeneration, including Resurrection. Okay, I can be hurt, but I'll get better.
4) Shape Shift. This would be fun. I could go to the best parties. Or I could acquire money. Or learn secrets. Seduce beautiful women maybe?
5) Summon. Have friends anytime I want them.
6) Armor. With 80 Active Points of this Power, I'd be damned hard to hurt with any conventional weapons. I could be a hostage negotiator or something.
7) Telepathy. Yeah, Menton-class Telepathy might be interesting.