My choice would be Mood Muzik 2 or 3.
Padded room in addition to those two for me. It definitely grew on me since it dropped.
Exxxes,
In My Sleep,
Do Tell, and
Happy Holidays definitely...They're some of his top songs imo, amongst some of the others on the album.
I'd play those along with Chino XL - Poison Pen
Eminem - MMLP or Eminem Show
Jay-Z - Blueprint
Nas - It Was Written
Ludacris - Chicken n' Beer
Kanye West - College Dropout
Lupe Fiasco - Either album or any mixtape
J.Cole - The Warm-up
Wale - Mixtape About Nothing OR Back to the Feature. (I usually play them on repeat either way).
T.I. - Paper Trail or Urban Legend
Tupac - All Eyez On Me
Slaughterhouse - Slaughterhouse (always on repeat).
If my Zune were erased tomorrow and I were left with just one of these albums, I could still end up having a good day, lol.
Honorable mentions: Lil Wayne - Tha Carter (I like this album....alot...but I'd never play it on repeat for long)
50 cent - GRODT (Came close, but I'd start fiending for wordplay and lyricism before long)
Chamillionaire - Sound of Revenge (Surprisingly, I like this album a ton, but it slows down waaaay to bad near the end for me to play on repeat.)