I'm honestly a pleb when it comes to metal knowledge, but there are a handful of metal records that I've honestly enjoyed start to finish:

Metallica:
[list][*]Ride the Lightning
[*]The Black Album
[*]Kill Em All[/list]
Dream Theater
[list][*]Octavarium
[*]Metropolis P2 - Scenes from a Memory
[*]Images and Words
[*]Systematic Chaos[/list]
Body Count
[list][*]Manslaughter[/list]
Nevermore
[list][*]Dead Heart in a Dead World[/list]
Iced Earth - I know Jon is a shit human being now but he and his band has made some killer music, so meh. :lol
[list][*]Dark Saga
[*]Horror Show
[*]Dystopia[/list]
Between the Buried and Me
[list][*]Colors
[*]The Anatomy of...[/list]
Rhapsody (of Fire)
[list][*]Symphony of Enchanted Lands II - The Dark Saga
[*]The Frozen Tears of Angels[/list]
Manowar
[list][*]Battle Hymns
[*]Warriors of the World
[*]Gods of War[/list]