I shave everything EXCEPT pits & legs. I don't know any men who do shave legs, but I haven't really noticed one way or the other. I do notice that in Dallas, it's still kind of edgy to shave your chest (DEFINTIELY not legs), but in-shape men can do it without too much hassling. Everybody in & out of shape in CA shaves everything but pits & legs.
I trim/nair everywhere but legs. that's the line i draw. that and pedicures/manicures.
although it'd be interesting to see what the quads looked like minus the fairly thick and dark hair