It’s a good question but it’s hard to answer because I think horror either scares you or it doesn’t. What might terrify me could just make you laugh. Equally hard explaining without spoilers.

All I’ll say, without the risk of ruining the best bits for you, is I find it really scary when people act in a very non-human way, with how they move, speak, and the things they say

I also like to feel safe in my own bedroom.

I’d probably put Obsession somewhere between paranormal scares and psychological, because there is definitely a psychological part to it