Most musicians (me included) view Zappa and his numerous collaborators as "Damn they can play.", but at times even I find myself putting on a Zappa CD and quickly turning it off if the mood isn't right. For me, there's something about his overall sound and delivery that makes him a "now and then" listen. Admittedly, I do not know even 50% of the Zappa repertoire, if that.
Though I always snicker at "Yellow Snow"....
