1) Any hope of some Crazy!Castiel? like how he was at the end of season 7. That couldn't have just gone away while they were in purgotory. So please, some Crazy!Cas, and Dean and Sam forgiving him completely, that bit's important, I don't want anyone being nasty to him over leviathan or the whole godcas thing (unless it's a bad guy).

I read one somewhere where Cas adopts some kittens to sort of prove he was still a useful, functional person which was cute.

2) Pacifist!Castiel, where he really sticks to his guns about not wanting to hurt anyone ever again. Maybe he has a mini breakdown if he hurts someone even by accident and is afraid he'll really hurt others like when he was god!Castiel and Dean and Sam comfort him... but really, anything with some pacifist Castiel would be awsome.

3) Any fics about future!Cas and Future!Dean. I was rewatching the episode (because Cas is just awesome as a stoned hippy), and it struck me that future Dean was sending Cas in to die because he knew he wasn't going to make it and he couldn't bear to leave Cas behind him, because that would really break future!Cas. So because I had that heartwrenching thought I need me some happy future!Cas and future!Dean fics, where they don't die, or  set before past!dean arrived, where they are just together and sorta happy.

4) Cas becomes the new Bobby. I don't know if anything like that even exsists, but it would be awesome. Cas would completely own all the people who called in to check on hunters , because seriously, would you ever not believe him if he told you to let some random person dig up a grave in your area?