I'd like a shark dorsal fin or cheetah spots-that'd be so boss; failing that maybe venom glands so I can be like a spitting cobra and melt the faces of people who upset me, cut in line at the supermarket check-out or who take too long to use the ticket machine at the train station.
In all seriousness though I am very happy overall with myself (having learned to appreciate myself) and only would like for my hair to get longer quicker and for me to develop even more muscle definition/muscle mass-the latter though I think I'd appreciate more and feel a sense of accomplishment having developed it over time with hard work and discipline as opposed to a quick-fix-not to say quick fixes are bad per se but putting time into something worthwhile is beneficial on numerous levels.
I would change my height. Being 5'5 makes dating hard for me when many women want someone relatively tall, and are just naturally attracted to tall guys. But that's the only thing id really change if I could
I used to want to change things about me, in fact I had a top 5, yeah sad :( but I'm happy with myself and how puberty has changed me and being a young women has really given a sort of metamorphosis into a person much more comfortable in their skin. So, I wouldn't want to change anything about myself :)