I had to vote for Appetite.
It's not that I don't like DSOTM. It's a great album. My problem is that my freshman year roommate, while not the worst compared to some of the stories I've heard, was pretty bad. He was the stereotypical frat boy.
The one thing in particular that drove me crazy is that he couldn't go to sleep at night unless he was listening to music, and he didn't like the feel of headphones, so he just played it as "quietly" as he could. As annoying as that was, what was worse was that he only really listened to three albums: Pink Floyd Dark Side of the Moon, Van Halen 5150, and Led Zepplin Houses of the Holy. I really like those albums, but if you listen to them over and over and over and over and over and over and over and over......well, you get the idea.