Demonic Possession movies are a storied enough subset of the supernatural horror genre to deserve their own category.
I’m not a religious man, but for some reason this is the genre that frightens me the most. Something about the creepiness of ordinary people turned into monsters, I guess.
Because of that, I probably have the most gaps in my viewing lineup for these films as well. I haven’t watched the Conjuring or Insidious films yet, and I haven’t fired up Paranormal Activity. I haven’t gotten around to The Omen, either, a movie that always frightened me from afar when I was a kid.