Opeth - Ghost Reveries
In my opinion, I believe this is the best album from Opeth. Its direction was totally different from Blackwater Park. The composition, the arrangement and the brutality of the music totally blew me off. Furthermore, it was the first metal CD I bought for myself. Never regretted.
Dissection - Reinkaos
Although this album is totally different from my favourite Somberlain era, the guitar riffs in this album are damn catchy. In my opinion, this album really redefined the meaning of melodic death metal.
Watain - Sworn To The Dark
It's one of my favourite black metal albums to date. It's a superb album and the composition is awesome. It reminded me of Naglfar's Sheol.
Dimmu Borgir - In Sorte Diaboli
I think many people will disagree with me but I think this album should be given its credits. The drumming in this album is fantastic (c'mon, it's Hellhammer!) and I like the concept of the album.
Equilibrium - Sagas
This album was a total mix of folk music, symphonic music and black metal. I chanced upon this album by accident and I totally like the distinct German folk elements in their music. It was really refreshing and no doubt, worth the buy.
Melechesh - Emissaries
I think I don't have to say much about this album.
Fantastic from the first to the last track.
Thorngoth - Thelema of Destruction
This is another black metal gem I uncovered while in Inokki. It was a German band and thier playing style reminded me of Dark Funeral although Thorngoth has a rawer tone and feels more like a European band.
Other credible albums include:
Symphony X - Paradise Lost
Kreator - Hordes of Chaos
Mayhem - Ordo Ad Chao
Limbonic Art - Legacy of Evil