Pepper's is my favourite by quite a way. I think it's their best. The most cohesive, the most inventive and avenue-opening, given what was going on at the time it came out, the best packaging. It has no real sag or weak spots (Revolver has a couple of more impactful individual tracks, but they're offset by relative clunkers like Dr Robert and Love You To). Sgt. Pepper's - John, Paul, George, Ringo and George Martin team-working to the max. Everest.