The thing that makes Opeth so so so so fucking good is that each album is a little bit different to the previous one, which allows them to develop and evolve their sound whilst not alienating most of their fanbase by drastically altering their music.
Think about it, Ghost Reveries sounds nothing like Orchid, but I can't think of any Opeth album (bar Damnation, and arguably MAYH) that is massively different to the album that immediately precedes/procedes it. I think the amount of change and development between each album is perfect, and it means Opeth can make consistently brilliant music, that is always progressing enough to keep things interesting, but retain an individuality and sound that is always their own. The way they develop also means every album has a slightly unique sound and songwriting style that characterises it (such as the dark, evil sound of Deliverance, the progressive, experimental sound of Morningrise, the cold, somewhat desolate feeling of Blackwater Park, the epic, adventurous Still Life etc.) but always sounds like Opeth, so all of the albums are amazing, just with a slightly different feel. From Heir Apparent I think this album [Watershed] will be no different- another fucking solid, but unique addition to the Opeth discography.
I swear to god every time I try and express an opinion about Opeth it turns into a fucking essay!
Oh, and please stop with all the arguing about drop D- it's pretty juvenile and just clutters up the thread.