Edit: I lied. Gave Uada another spin. A good album for sure, but not top 10.
This was by far the year I've stayed most current in (ever) and I have a little more variety than past years. Still, I pretty clearly show my sub-genre biases so this is in practice a list of the year's strong atmospheric/melodic BM releases with a splash of other stuff. In 2017 I'm going to try to delve into Stoner/Sludge, Dungeonsynth and Neofolk more as they're all genres I enjoy greatly but admit my exposure is lacking.
Top 10
Cobalt - Slow Forever
Fyrnask - Fórn
Hyperion - Seraphical Euphony
Kvalvaag - Malum (bizarre symph-ish BM, check it out!)
Mare Cognitum - Luminiferous Aether
Moonsorrow - Jumalten Aika
Oranssi Pazuzu - Värähtelijä
Sunnata - Zorya
Urfaust - Empty Space Meditation
Vektor - Terminal Redux
Honorable Mentions (tags for less known stuff)
Ash Borer
Astral Path (atmo/ambient BM)
Cult of Luna/Julie Christmas
Desaster (BM/Thrash)
Destroyer 666
Eternal Champion
Frozen Forest (BM, more harsh/lo-fi than my standard)
Forteresse
Forndom (neofolk)
Galdur (dungeonsynth)
Grand Magus
Latitudes
Sig:ar:tyr
Spaceslug (stoner/psych)
Uada
Wardruna (neofolk)
Witherscape
Yith (black/doom)
Letdowns
Bolzer - I dig the title track but compared to the last two EPs...
Opeth - Meh. The worst since Watershed.
Saor - It just felt less than inspired, if not forced.
Zaum - Way too ambient compared to the GODLY 'Oracles' prior. Good background music maybe.
Zhrine - It loses its effect greatly with more listens, but I was in love on the first listen.