Been playing for about 3 1/2 years now, I'm still decent when I play standing up, but noticably better when playing in my (preferred) sitting down posture. For a while I had my guitar slung low for maximum coolness, then I decided maximum coolness lies in my easy access to all the frets so I looked to see whereabouts Vai and Satch keep their axes strapped. Not quite down to my knees, not quite nipple-ridin', I'd say the majority of the guitar is above my waist though.