I lost interest when Dark Side came out partly because it got overplayed, especially in my college dorm. The two I play most are "More" and "Obscured By Clouds." "Ummagumma" was my intro so I always enjoyed the more avant garde PF. PF with Syd was kind of like the Beatles with Pete Best in that the core PF was Gilmore, Waters, Mason and Wright. Any deviations from that line-up weren't Floyd to me IMHO.