If you don't physically age gracefully, it's a bit sad. I think Steven Tyler can get away anything, because he still looks like he did in '73. Especially from row Z backwards in an arena. As long as the Stones keep their hair and don't get fat they'll get away with the wrinkles.
I think to just single out a highlight of Elvis's career is pretty much impossible. As far as being a fan of his, a lifetime fan, there were just too many highlights.