There are already threads for your most and least played songs, but I want to know what your most played album is. You can go by instinct, or you can add up your plays on iTunes or whatever program you use. If you want, include bonus tracks as well. You might be surprised. Please try to explain why, so this doesn't become a list thread.
Surprisingly, my most played was 21st Century Breakdown, edging out American Idiot and Nimrod for the top spot. Last spring, before I had any of the '90s albums, I listened to 21CB and A.I. like crazy, and the former's eponymous song became my favorite for quite a while.
Note: This has nothing to do with what your favorite album is, unless they happen to coincide.
Edit by Andres: Please respond with more than just the album name in your responses. A little detail about your choice for the sake of conversation.