Level Design advice.

[Damascus Rose]

What scares you the most?
and do you respect or hate jump scares

I'm terrified of bad grammar in notes, flickering textures in the environment and poor scripting. Sometimes I even wake up at night in a cold sweat.

There is no one singular part of Amnesia that scares me; as a matter of fact, after playing poorly made mod after poorly made mod, I'm rather desensitized.

The most important part of atmosphere (aside from some decent mapping) is the sound effects. My god. If you can properly pace very subtle sound effects and sound events throughout your level, it can really put someone on edge. If someone's on edge/paranoid, they're much more susceptible to jump scares (not randomly appearing objects/naked people) and other various scare-events.

tl;dr - Amnesia (and true horror in general) is all about subtlety.

^This. Of course it takes a lot of experience with the editor and you should have a few stories out to be able to do these effectively. (Not that I can say I really know what I'm talking about, I'm new to this too.)