A while back someone posted on the Genesis forums a question about what albums are good from start to finish, that do not have a bad song on them, that you'd happily listen to from beginning to end. Then today wasabi_poptart asked basically the same question, and I was like, wait! I need more data on this! The Genesis forum people are a little... biased, I'd say, in favor of certain genres. I expect better of my friends' list though, so please fill out a little poll with the albums you think are classics, virtually without a dud on them, your favorites.
(I am a nerd and have a list of more than five, and if you are like me, feel free to expand in comments.)