Definitely the shoes. I was pigeon toed to about age 6 and had to wear special shoes, I survived. Spandex, no way !!!
Then definitely invisible, I am incurably nosy, that would be my idea of real fun. Then again, I would have to be prepared to hear some maybe not so good stuff as well.
It would be nice to try it out for a while though. I always envied Harry P. and his invisibility cloak.I can think of all sorts of mischief I could indulge in.