Been appreciating Metallica's return to form lately. After the mixing nightmare that Death Magnetic (otherwise maybe one of their best albums of all time) this was an absolute redemption story. Fantastic, if possibly a bit forgettable tunes that weren't mixed into one flat bar.
Here Comes Revenge and their absolutely delectable tribute to Lemmy
"Murder One" are particularly noteworthy.
They might never be the most unique, the heaviest, the technically best, etc etc... but Metallica will never be someone that can be simply denied. The "Hardwired... to self destruct" album is a return of the titans.
Edit: Full disclosure, this album pushed me over the edge towards buying yet another instrument I'll have the full intent of learning and mastering, which'll eventually turn into another dusty clothes rack. An electric guitar will go nicely with the keyboard, bass guitar and violin I've got as display pieces.