I've already explained why I like Andrew WK. He's basically the personification of Party God from Adventure Time, or as he himself puts it, "The real life Slurms McKenzie".
As with The Darkness or Electric Six, I don't listen to Andrew WK very often. But when I do, I'll go through several days of listening to the same album again and again. I'd call it a guilty pleasure but I'm sure not feeling guilty. Like the man says "We do what we like and we like what we do."