Blackwater Park (This blend of soft and heavy, and folkish sound is what drew me into Opeth)
Ghost Reveries (The album title explains the atmosphere perfectly, Sitting in an empty candlelit room with a full moon shining through the dusty windows, telling Ghost Stories)
Damnation/Deliverence ( I place these two as one due to them being complete polar opposites of another, one being extremely soft, acoustic, and calm, the other hard, loud, and hectic)
Sorceress (Even though the production is what it is, these songs are great, it's shown on Garden of Titans, Era being a great one)
Watershed (Continuing the Blackwater Park era sound, but adding an even more darker, mysterious, sinister mood)
My Arms, Your Hearse (Interesting way they made the lyrics into a story, on the liner notes, has one of my favorites 'When')
Morningrise (It has some amazing bass work. Nectar being one I like, don't know why)
Heritage (I enjoy the songs, the flow of the album is where I find it hard for me to listen it in full)
Pale Communion (The songs are good, but I find it hard for me to listen to the album in full)
Orchid (As Mikael describes it now, Just black metal nonsense)
Still Life and In Cauda Venenum, haven't listened to these as much. Although, Face of Melinda is an excellent song. Roundhouse Tapes version is my definitive version.