Keith Moon was great until drugs started slowing him down in the mid-70s, right around Quadrophenia. I have a DVD that sports a chronological collection of live Who performances, and once it gets to 1974, it looks like Moon starts playing in slow motion. By the time he died in his early 30s, he had lost just about all his touch, at least in live performances, and he looked like he didn't know what to do with such monster sets as he used, with layers of toms. His best period was when he used the "simple" 7-piece sets. ;p