Can you define what makes Amnesia scary?

[xdeath]

Amnesia relies on player imagination combining with a dark atmosphere.
I quit for 2 weeks and I was only in the distillery(after the acid puzzle just before the water monster).
I didn't know what to expect. The atmosphere mixed with the brief monster appearances, made me think there was one waiting around the corner or in the next room.

Suggestions:
Keep the player guessing. No predictable monster spawns.
Prior to the release of the CK for skyrim, I came up with a good idea script for Random Monsters spawns(for use with HPL editor). In which, the monster could spawn randomly at any one of a number of locations, or not at all.
Above is useless without a threatening or dark atmosphere.