Well, this is just something me and my friend figured. Opeths work seems to have kinda been a 2 CD musical related path kinda thing, I can't explain it to well.
Orchid and Morningrise, by far the best of their work. My Arms Your Hearse and Still Life kinda went in a deifferent direction and were both concept albums. Blackwater Park, Deliverence, and Damntaion. Which we all know Deliverence and Damnation was supposed to be a 2 disk thing but because of the record company or whatever, they wanted to sell it seperately but you kinda put those 2 together and it sorta relates to Blackwater Park.
Now we have Ghost Reveries, once again I am blown away and they added some cool black metal and metalcore influences in there is what it sounded like, and by far the best of Mikael's clean vocals so far. Honestly this was my least favorite out of it all but I still love it. So Me and my friend think they will kinda do another album kinda like Ghost Reveries.
Like I said all above there, to me and my friend it kinda sounds like they kinda change things around every 2 CDs. Even though all their CDs are quite unique, you still get where I'm going with this. If this oppinion was already posted, I'm sorry but I didn't feel like going through 13 pages. Plus I'd figure this was a good way to look at it.
\m/ OPETH \m/