Let me be the first to write a serious response.
I think the first two albums were masterpieces even with the crappy production, which to me, adds to the atmosphere.
Although MAYH has some really good moments, I believe that cd is overrated, simply for the reason that I personally can't just put it on and listen all the way through as I can with other Opeth cds.
Still Life has awesome production quality and most of the songs on it are great. Way better than MAYH, but still another one I can't listen to all the way through.
BWP is a decent cd, still an Opeth cd, with is evident but the music. This cd is the one I have listened to the least, even though it was the newest one when I first got into the band.
Deliverance is a masterpiece. I can listen to every song on the cd and then repeat them. There are so many unbelievable moments on that cd and every time I listen to it, I hear something I hadn't noticed before.
Damnation is another awesome cd. The only song off it that I don't like is track 3 (the name of which is eluding me right now). Closer and its abrupt ending is by far the best moments on the entire cd. I don't listen to them so much now, but when I hear this song, it reminds me what got me into them in the first place.
GR... well... This is where I started listening to them less. I simply couldn't get into this cd... I tried like a mofo, but simply couldn't. I think there are 3 decent songs on the whole cd.
Roadhouse Tapes is fuggin awesome. I love live music, and have seen them live 6 or 7 times, so I knew before I even got this that I would love it. I would say this is probably one of the best live cds ever released by any band with the exception of Genesis - Live (circa 1973).
And as far as Watershed goes, I have listened to the intros of all the songs, and one song in its entirety, but nothing really grabbed my attention making me want to hear more. That said, I can admit that I still haven't given Watershed a fair enough chance before I really opine.