Is this hypothetical limited by current surgical possibilities, or is this more a hypothetical surgery genie? If the former I don't even know. Actually I take it back, I do know. The right side of my face is wider and more masculine than the left, so something to make my left side closer to the right side would be nice. Like, I can flex my jaw and on the right side it will get a little bit of that "chiseled" look with the cheek slightly sunken in, but the left side just stays limp, like I can't even feel the same amount of jaw on that side. I think it might have to do with a dumbass orthodontist removing a 12 year molar from my lower jaw's left side when he was only supposed to take the wisdom teeth. I wouldn't say I'm that insecure about it, but as a narcissist that has thousands of selfies and cannot enter a room with a mirror without checking myself out, it would still be a nice bonus.
If magic is allowed, though, I wouldn't mind being at least a couple inches taller, but I don't want to have my femur broken and mechanically extended over a period of months and stay fragile for the rest of my life just to get that.