I'd wish to be immortal, as in truly immortal, ageless past my prime, and unable to be killed or even permanently harmed in any way. With this, anything else I want or will ever want I can eventually get on my own. Unlike most, I don't really care much if people I know or will know die or anything, and I would eventually move on to other universes in order to avoid the death of the universe, so that's no problem.