What is it that scares you the most about Amnesia?

[Duskofdead]

The potential danger...sometimes before it's even reared its face in your direction. Half of it or more is the suspense, the danger lying dormant rather than danger manifested.

Yup, in a way it's scarier to hear the "grunt danger" music start playing than to actually see where he is, because you immediately double back to hide somewhere and have no idea if you're going to end up running right into a monster's sight.

I don't even need to see the servants to be terrified when I get the clues that they are around.