Me too... worth his weight in 'gold'... listens, is timely with feedback, makes useful feedback, takes you beyond your comfort zone (but in a nice way), is encouraging... and, well, although busy (has over half a dozen PhD students besides me)... still manages to make time for you. I think what I most appreciate is when you have his attention, you have it... wholeheartedly (i.e. takes no phone calls, no interruptions, etc.). Also, answers your queries with 48 hours. Yay!