When you write horror, what goes into making a creepy, horrific monster?
I think it comes from the influence of Gothic horror movies. Sure, the castles were filled with ghosts and monsters, but the evil that always seemed to be most at play was that of the living humans. Greed brought out the ghosts. Lust ignited the passion of vampires. The human evil always trumped the supernatural one.
I think that's a trait of much of the best horror fiction.