I just noticed that in Shippuuden 81, when Pein was describing the reasons for war, etc. With each word he said, the view zoomed on a a particular member. For example,
Religion - Hidan.
Resources - Kakuzu
Grudges - Kisame
Land - Zetsu
Love - Konan
Just Because - Deidara
It may be a coincidence but I think there may be some insight as to why some of these characters fight or why they are involved in akatsuki, etc. i think it'd be interesting if it gave insight to characters like Zetsu and Kisame, could their goals really involve land or grudges? After all the Hidan, Kakazu, and Deidara reasons fit really well.
I dunno, just throwing it out there. Discuss? :]