I've realized that only a few people knew about Castiel or like Charlie that know what he was but had never see him, so...would someone help me with this?

1) Fics with angels interacting with humans (hunters or civils). I want to read the reaction people would get by knowing that the person in front of them is an angel. (Better if it's after the fall)
2) Or others watching how the Winchesters interact with Castiel knowing what he is.
3) Also accepted, POV's from people who just discover about the supernatural. (Kudos if it's because of a demon or an angel)
4) Gabriel (Or Balthazar) pranking humans or befriending someone who knows that he's an angel or a pagan god.
Oh, anf if there are with Jesse Turner (The Antichrist) in those kind of situations, it would be awesome.

5) The boys/Castiel/etc going back in time and meeting his younger selves? (E.g. seson 8 meeting season 1-2-3-etc)
Thanks