To me, one of the hottest parts of a guy is a sexy pair of muscular legs (in addition to the vein that runs down the middle of a pumped up bicep...)

I really dig the way this dude squats and his attitude --

MyMuscleVideo.com

This video clip has lots of great quads and glutes --

http://www.mymusclevideo.com/system/view.jsp?vid=1406