What are yours? Mine are:

Wish You Were Here - Pink Floyd
Dark Side of the Moon - Pink Floyd
Origin of Symmetry - Muse
OK Computer - Radiohead
Lullabies to Paralyze - Queens of the Stone Age

my 5 are (not in order from best to worst) are maybe

In Utero-Nirvana
Back In Black-AC/DC
Toxicity-System Of A Down
Automatic For The People-R.E.M.
Silent Alarm-Bloc Party

Incubus - Make Yourself
Sublime - Robbin' the Hood
Metallica - Master of Puppets
Stemm - Blood Scent
Sublime - 40 Oz. to Freedom

back in black-AC/CD
use your illusion-GNR
OK Computer - Radiohead
GNR's greatest hits-GNR
the black album-metallica

I'll filter my list and keep certain things out, like my Jpop.

Three Days Grace: One X
Three Days Grace: Three Days Grace
Papa Roach: The Paramour Sessions
Papa Roach: Getting Away With Murder
Panic! at the Disco: A Fever You Can't Sweat Out

Not in any specific order.

Alice in Chains: Dirt
Korn: Follow the Leader
Apocalyptica: Amplified: A Decade of re-inventing the cello
Seether: Finding beauty in negative spaces
Disturbed: Indestructible

Down right old school Metal. These guys knew where it was at and how it was done. By the way what's Jpop. I'm afraid to hear it because it sounds indescribable.

Destruction System by Morbid Saint
Weave The Apocalypse by Invocator
Individual Thought Patterns by Death
I was Watching My Death by Magnus
Handle With Care Nuclear Assault

Pink Floyd - Wish You Were Here(<3 War)
Deep Purple - Machine Head
Led Zeppelin - Houses of the Holy
RHCP - Californication
Blue Oyster Cult - Agents of Fortune

:3

Not in any special order;

Metallica - Garage Inc. (best cover album ever, yes)
Pink Floyd - Wish you were here (sup war, Mosier)
Ludovico Einaudi - Divenire
Stevie Wonder - Innervisions
Led Zeppelin - Houses of the Holy

Meh, lots of stuff to choose from.

Operation Ivy - Energy(/Hectic)
Harder they come soundtrack
Bolt Thrower - Warmaster
Blondie - Parallel Lines
The Smiths - Queen is Dead