I think it would be very in-character for me to have a mutation that is impossible to cover up, like wings, or whatever Beast has. basically like something which causes me to be alienated by society.

at the same time, the power I would want more than anything is the ability to stop time while retaining the capacity to affect matter + move freely (I know this power makes no scientific sense, but it's what I want). I would loooove to be able to effectively have infinite time to read, write, sleep, have breakdowns, etc. also the heist potentials are ripe. I'm not sure how that power could manifest in a way which makes me look visibly different, maybe my eyes have an unnatural look to them or something

I would not stay on X's side for very long. I think I would be a star pupil for a while and then, after one too many fights with folks there, run off and join the gay punk mutant subculture that must exist.