Siamese Dream is one of the 90's best, no doubt. But I always felt Mellon Collie was the most overdone, pretentious release I've ever seen. A separate booklet for artwork? Give me a break. And Corgan calling it "The Wall for Generation X" didn't help either. The guy has a true musical gift, but some pretty awful lyrics at times, and that double album was full of them. Could easily have been a single disc.
Oddly enough, I really enjoyed the much-maligned Adore, recorded during Jimmy Chamberlain's involuntary hiatus from the band. I admired Corgan's restraint on the album, and strangely the only guitar solo he takes on the album is on For Martha, which is about his deceased mother. And it's amazing.
I was also one of the few who appreciated MACHINA, even though it was almost as pretentious as Mellon Collie. At least it was only one disc, and it had some great catchy rock music on there. I have yet to hear the entire MACHINA II, which was unofficially released, although many people say it's the best thing they did since Siamese Dream.