Sarcasticgamer.com goes into an in-depth examination of the Mario archetype and distills the video game character down to one detail: the mustache.
From the article: "Tom Selleck and Billy D. Williams both had mustaches. Magnum P.I. and Lando Calrissian were knee deep in ladies during their day. Then Selleck shaved his off and saw his movie roles and ladies decline. That's why Mario doesn't roll without one. Ron Jeromy has had a mustache since age 8 and he has always been a BIG hit with the ladies..."