OK, this isn't in order of preference, but in order of when I think of them-
1- Alice In Chains- Best Of (well, if I couldn't have this, dirt)
2- Metallica- S&M (I like the dimension the symphony adds)
3- Pantera- Official Live: 101 Proof (live they have an energy that's not in their studio albums- Walk is fantastic on the album!)
4- Midnight Oil- Blue Sky Mining (their best album, every track is great)
5- Slipknot- Vol 3: The Subliminal Verses (brilliant, less blind hate and more emotional searching)
6- Mudvayne: Lost and Found (brilliant)
7- Audioslave (reall nothing to add)
8- Opeth- Blackwater Park (I love this)
9- Beethoven's 9th Symphony (the third movement does something for me, I don't know why... must be the minor sevenths)
10- Mr Methane- Trouser Trumpet (If I want a laugh)
If I could have another I would add supposed former infatuation junkie by Alanis Morisette, it's all about a spiritual journey; fantastic
EDIT: added extra album