That doesn't really work. If you did have a clone who was physically fitter than you, then he would be stronger, faster, have more stamina etc. I'm not saying that people should be judged on their appearance, far from it, but being in shape does make you a 'better'* person, purely from a biological standpoint anyway. I mean honestly, if you were given the option to instantly hit your physical peak for nothing, are you telling me you'd turn it down? I know I wouldn't, and it's nothing to do with society.
Anyway, no I'm not really happy with the way I look, but I have much more important things to worry about at my age than my self image. Like getting a job, for one.
*This, of course, really depends on how we define 'better'.