I realized if I'm not really making an album, I don't have to be concerned about things like stylistic consistency, pacing, a coherent mood. All that stuff goes out the window.
Well, because we're so different as people. And it's that difference that probably also makes it easy to stay together, because we don't get in each others way.
If you look over the years, the styles have changed - the clothes, the hair, the production, the approach to the songs. The icing to the cake has changed flavors. But if you really look at the cake itself, it's really the same.