The motivations of the following characters, have been were shown in the anime:
- Tobi/Madara and Zetsu wanted to capture and seal the Tailed Beasts for his Moon's Eye plan.
Pain and Konan wanted to capture Tailed Beasts and use them to destroy the Five Shinobi Nations.
Itachi wanted to make sure the Akatsuki didn't attack Konoha or capture the Nine-Tails.
Kisame already had connections with Madara before joining Akatsuki.
What motivations did Hidan, Kakuzu, Deidara, Sasori, and Orochimaru have to join the Akatsuki?