Hi Kim - Firstly, thank you for this excellent article. I am a huge horror fan (as well as a fan of cinema in general) and it is always a joy to discover a kindred spirit.
To answer your questions, my favourite horror films are listed or linked to in this piece, which I think you'll enjoy digging into. :)
https://medium.com/fan-fare/my-twelve-favourite-horror-films-21bdeff0297b
I'm also linking to a couple of other pieces you might find interesting that address your other questions concerning my experiences of horror and so forth.
https://medium.com/writers-blokke/are-horror-fans-desensitised-51834d14dce7
https://medium.com/illumination/horror-and-christianity-incompatible-827d0c9ad559