My only motivation is keeping good physique and not being embarrassed of what you look like. Getting compliments from opposite sex is nice as well
I might be one of few, but I really do not have to watch my diet much at the moment. I do eat moderately healthy though, no junk food or pop but other then that I really eat what I want. For myself, as long as I keep working out then I stay in good shape and lately since I started going harder I been getting bigger and stronger which is a plus.