For the same reason I enjoy horror in general, I'm fascinated by the macabre and how it plays with people.
Call it a morbid fascination, but all things unnatural, disturbing, and borderline supernatural just interest me in how it plays with people and their reaction to it. Everyone has their limit to what scares them, and the psychological stuff, like in Silent Hill, that plays with your head is the stuff that I enjoy.
Well, maybe not
enjoy, but I like to see what actually scares me and see what people can come up with in terms of horror. Normally there's an unwritten metaphor or message that the creator is trying to tell by just showing it in various ways, and sometimes it's good and sometimes not so much.
It's a fun little journey that I like to partake, even if my little heart doesn't like it.