Could I ask for extra neural fibers in my corpus callosum? Not really a physical trait, did you mean how I look? I mean I am rather short, have no hips, hate my face and have weird legs but physical beautiful is pretty meaningless if you’ve no substance as a person :P That’s the closest I’d change about how I look, maybe I’d ask for two copies of the genes that code for the Delta 34 mutation in my cells so I couldn’t get HIV or smallpox (in theory), I’m gonna consider that a physical feature because the CCR5 and CXCR4 receptors are absent on the surfaces of cells of people with the Delta 34 mutation