Some albums are hard to define. Others are simply from genres that are not very large. Here's a list of some of my favorite miscellaneous albums.
Cynic: Traced in Air: Progressive metal band ditches most thrash and death influences in triumphant return after nearly two decades.
Down: III-Over the Under: Southern metal supergroup proves to be much more than the sum of their parts.
Eluveitie: Slania: Melodic death metal mixed with Celtic folk influences forming an amazing mix of music and one of my favorite albums from 2008.
Into Eternity: The Scattering of Ashes: Crazy mix of progressive, power, and melodic death metal with one of the greatest multi-voiced singers in metal.
Lair of the Minotaur: War Metal Battle Master: Unholy combination of doom and thrash and one of the greatest band names in recent years.
Mastodon: Leviathan: Difficult to categorize band on their finest album.
Opeth: Blackwater Park: Progressive extreme metal masterpiece from Swedish giants.
Orphaned Land: Mabool: Beautiful, epic progressive Middle Eastern folk metal centered around the story of the Great Flood.
Scar Symmetry: Pitch Black Progress: Power metal and melodic death metal thrown together with one of the best metal singers to come up in a long time.
Wintersun: Wintersun: Originally founded by a former member of Ensiferum and blending melodic death, black, progressive, and folk metal seemlessly.