One of my favourite bands. They're pretty ridiculous and make no sense most of the time, but they're just so much fun that it doesn't even matter. As Belligerent said, they go from one style to another frequently, which is one of the things I love about them.
Stuff like Voodoo Lady is just plain catchy, while stuff like Push Th' Little Daisies is just hilarious
Considering their albums, they haven't had a "bad" one imo. Chocolate and Cheese, however is a must have, and I also love Pure Guava and The Mollusk.