Keith Levenberg may not post very often (there were four long months between his post of March 2 and his post last November), but his topics are truly stimulating.
His post last August on why "buy what you like" is "absolutely terrible advice" was positively inspired. (Among Mr. Levenberg's provocative statements: Taste is not as important as you think.) It's a long post in fact, most of Mr. Levenberg's posts are more like essays than notes but he raises, and argues, a number of excellent points.