Things you like and hate in Horror Games.

[Echohalls]

Likes:
A Good, Original Story (AMFP and Hyde)
Atmosphere (Daylight and ATDD)
Uses music to its advantage (AMFP and ATDD)
Uses proper scares (ie; Tension based scares. Daylight and ATDD)
Good Voice acting is always a bonus. (AMFP and Among the Sleep)
Good use of Enemies and Mechanics (ATDD and AMFP's Cut Infection Mechanic)

Hate:
Shitty and Cheap Jumpscares (ie; Outlast and Slender)
Irritating or just Bad Voice acting (Certain amount of games...)
Almost any game that uses Slender Man and the shitty Collection mechanic...
Outright Laughable and Stupid Enemies.
Any game related to Creepypasta.
Games where you have a fucking whole orchestra behind you every time (Outlast and The Evil Within)

[boredgunner]

I don't hate anything in Penumbra and Amnesia: The Dark Descent. I hate unoriginal settings, writing, and scares, like Outlast. I hate overly linear and oversimplified level design/gameplay, like Outlast and Dead Space. I hate it when games mimic cheap Hollywood SyFy horror, like Outlast.

[VaeVictis]

Back tracking. It's one thing if you miss something and need to go back for it, but if, in the course of the story, you need to visit the same place 3+ times, the horror factor is replaced by boredom.
FUSES. No horror survival character can seem to hold on to or use fuses correctly the first time around.