His books have taught me soooo much; in addition to information theory, I have learnt many tricks of LaTeX typesetting (the info theory book's LaTeX source is

His books have taught me soooo much; in addition to information theory, I have learnt many tricks of LaTeX typesetting (the info theory book's LaTeX source is open) and how to estimate (from his other book on sustainable energy) David was a fantastic ultimate frisbee player. He taught me how to properly throw forehand and overhand.