I think that little 3 ft. tall chipmunk of a gymnast (Shaun Johnson) is also a great ambassador(ess?) for her sport, and the US Olympic presence. Kinda like Mary Lou Retton v2.0

. Very proud of her country, yet modest and mature for her age. Being articulate in front of the camera, and displaying great sportsmanship doesn't hurt either.
The one I really can't stand is that arrogant, showboating, Jamiacan runner, Usain Bolt. He is damn fast though.