.
Funny thing: when I was 18 I'd rather be thought of as hot/cute/sexy than fit, and if somebody had complimented me on my muscles I would find them a bit creepy (I had muscles back then too, rode race-horses for a living age 16-20). Now I would much rather be complimented on my fitness than my "hotness", which I would find a little creepy...
In general I would never want to be 20 again. Lawdy, what a hassle.