My superpower would be the ability to switch bodies at will. Like the mother from Freaky Friday. However, I'd have to know roughly where the target is in order to do it.
So, for instance, I could switch with the president for a day, and write up a budget that puts all of the money into research (good luck getting half of congress to vote for it at once, though.) Also, if someone shoots me, I have a split second to switch with them, and I get a free gun as an added bonus! Plus, if I had an arch-enemy, I could force them into an old man's body
(although said arch-enemy would probably have the power of invisibility or something, nullifying my powers... hm) And some other great powers can be approximated with this (shapeshifting, teleportation, eternal life).
This also makes for great fun once the government learns I have this power. For instance, they might track me down and put me in a straight-jacket in a padded room with no guards anywhere near it, so I couldn't use my power. However, I would have already memorized the location of an old woman who never leaves her bed, and would deduce my location on Earth using the Coriolis force and... uh... I'll think of something to figure out the other coordinate as well later...
Of course, I'd hide the fact that I can also switch bodies with animals until my final showdown with my nemesis.