What is your idea of a Perfect Album?

I was just listening to Kid Creole and the Coconuts album "Fresh Fruit in Foreign Places" and came to the conclusion that it is a "perfect album". The story line, the instrumentation, the mix and even the artwork are all included in my rating of this record. Yes, the artwork and liner notes count as well. Dark Side of the Moon is a another good example. There's a million of them, whats yours?
Cheech and Chong Big Bamboo, Hey...its a 70's thing and I actually used the paper.
Pink Floyd, The Wall. It is hard to stop once the music begins. Can't say how many times I went to bed later than intended because I had to hear the ending.
This doesn't count as I'm only referring to one side, but side 2 of Abbey Road works the same magic.
I could name a few more but I'll wait to see what developes.