I would really 愛 another season of Ao no Exorcist. Except one which follows the マンガ better. I prefer the マンガ a lot もっと見る so it would be nice to see it animated. Plus there was a lot of things which were left unexplained in the anime's ending. It was kind of rushed too~
I've seen a few animes where the story never finished and I wish it could have. There was no 'next' season and they desperately needed one to finish the story.
Fruits Basket 07 Ghost Zombie Loan
And my number one biggest disappointment in not getting another season was Amatsuki. Come on! He's still trapped in the other world and they were about to go into a big battle.... so frustrating.... One of my お気に入り villains AND one of my お気に入り female characters came from this series. So I fell in 愛 with the characters, the idea behind the アニメ was interesting, and there was cool and epic fight scenes. I still encourage people to see it, despite it not getting a 2nd season.