If you could have any super power you wanted, would it be unaided flight, x-ray !

If you could have any super power you wanted, would it be unaided flight, x-ray vision, or China?

Hi, i think i would choose X-Ray Vision and then id put it to good use. Like seeing into peoples bodies to find their problems so they could be fixed and treated quicker. Lest that way they wouldn't have to suffer in as much pain because the doctors fail to find out whats wrong with them.

Also "wink wink" i could use it on my partner. Wouldn't need to undress my partner with my eyes would I.