Through my formative years, I watched a lot of Saturday Night Live, and the musical guests (not surprisingly) always fascinated me, in some cases blowing my mind. As a teenager especially I would videotape the show and if the performance was good (or, often, even decent) watch the musical bits over and over, studying the performances. I would also watch reruns on cable and was interested in the differences in musical style and allowable levels of eclecticism.