3. Metallica, 'Hardwired...to Self Destruct'
Metallica alienated a lot of fans in the 1990s and early 2000s by moving away from their thrash metal roots, but their new LP Hardwired...to Self Destruct continued the path they started down with 2008's Death Magnetic in which they embrace their 1980s sound, but found a way to move them into the 21st Century. There was an eight year wait for this album, but they used that time to put together enough killer riffs to fill up two CDs. It's a radically non-commercial record, but the Metallica faithful happy were very pleased with it. They're going to sound great live on the road next year.