I probably only heard 10 new albums this year, so to be more discriminating, here's a top 5:
1. Symphony X - Iconoclast. Absolutely brilliant album, personally I believe its the best they've done since Divine Wings.
2. Decapitated - Carnival is Forever. Another brilliant album, and a great return for these guys. I rarely find examples of death metal that I feel exhibit a true work of art, and this is one of them.
3. Amon Amarth - Surtur Rising. The ACDC of death metal, and I totally love them for it. Lots of fun.
4. Obscura - Omnivium. The most talented progressive death metal band out there right now IMO. I was really happy to see them go in a more prog direction from Cosmogenesis. Their guitarist, Christian Muenzner, also released a killer instrumental album this year as well.
5. Vader - Welcome to the Morbid Reich. These guys never fail to disappoint me. Like Amon Amarth, you pretty much know what you're getting, but its so well executed that it doesn't matter.
Honorable mentions:
1. Opeth - Heritage. I dig the oldschool progrock direction they're going in, I just think it could have been better realized.
2. Abysmal Dawn - Leveling the Plane of Existence. Really impressive young death metal band. Nothing groundbreaking, but a solid release.
3. Deicide - To Hell With God. Another solid death metal release with some killer solos from Ralph Santolla and Jack Owens.
Albums I only heard a song or two from, but I thought were cool:
1. Mastodon - The Hunter
2. Iced Earth - Dystopia
3. Absu - Abzu
4. Revocation - Chaos of Forms
5. The Black Dahlia Murder - Ritual