My favorite's probably Dropkick Murphys' Do or Die, which is also the only album by them that I like pretty much every song off of.

The cover picture's sick because it pretty much represents the album as a whole and reasserts the working-class nature of punk music. The back of the album is cool too, but I can't find a picture of it. It's a picture of a crowd of kids at some punk show, and it kind of shows the relationship between the two groups. Kind of an artsy explanation, but whatever. What are some of your favorites?