The CDs are basically three parts of one album - they are all different. And Billie Joe has described it as the leading into the party, the madness of the party, and then the hangover after the party.
"Oh Love" is not the best work they've ever done, nor is it my favorite, but it is still dazzling and awesome, and I think the main reason that I don't love it more is that it is not a feeling or situation I can relate with.
Brianne, well, I should hope that they're always changing, but they still always have the same spirit and vibrancy because, as far as I can tell, they love their work.