I say Telekenesis, because you could have everything. You could fly, by moving yourself with your mind, you could be invisible by bending light around you, and you could morph a magnetic/gravitational field around youself to deflect bullets. And you could create a field around yourself all the time to block diseases.
EDIT:
Double Edit: Added some more options, waffle making because IT'S THE BEST SUPER P0W3R 3V3R |_0|_ 1337 !!!13245385 Waffffffles.
Triple Edit: Who said Waffle Making???
EDIT:
I wouldn't say Time Travel, because if you used it a lot, you'd die much quicker. Also, if you changed what happened in time, paradoxes would be created, and the space-time continuim would explode and stuff. Also, if you changed time, you'd change situations, and you make a lot of enemies, one day, a sneaky person's gonna have a knife...misfit7707 said:DAMNIT SOMEONE BEAT ME TO IT, yeah time control.
UPSIDE: being able to travel instantaneously, and totally mess with people, go anywhere you want, etc.
DOWNSIDE: Aging faster... every moment spent in stop-time is spent growing that much older before you start time again. One could die of old age in a nanosecond if they wanted to or if they got too excited about perpetual matrix bullet-timey-ness.
OTHER CRAZY CRAP: Laws of nature would prevent you from redoing things by going back in time. Grandmother Paradox. Changing things upsets the circumstances by which you traveled back in time in the first place, etc... Just trust me I've studied this. You can't change the present. BUT you CAN 'fix' it so that you have a bright future... as long as that future happens after the moment of your initial travel.
Double Edit: Added some more options, waffle making because IT'S THE BEST SUPER P0W3R 3V3R |_0|_ 1337 !!!13245385 Waffffffles.
Triple Edit: Who said Waffle Making???