I've always been partial to meddle, even though it, like wish you were here, has a large number of passe tracks (The entire middle of meddle, welcome to the machine, have a cigar), the bookends, especially echoes makes the album something beautful and wonderful. Wish you were here is a good album, IMO, but not great. Shine on you crazy diamond gets lost in the over-abundant synth keyboards, wish you were here is probably my single favorate pink floyd song though
Darkside of the moon is a great album, pretty much begining to end, with few weak tracks, aside from on the run, but doesn't capture the same beauty that a song like echoes does in my humble opinion
The wall has some great tracks on it, however, some of it really only makes sense in the context of the album (Comfortably numb undoubtly). Hey you is still a great song though.
I just don't understand syd barret. Perhaps there is some genus to him, however, i've never been able to see past the fact that he's clearly insane