I’m really not a fan of horror as a genre, I suffer enough from night terrors without giving my imagination something to really work with!
I do make a couple of exceptions, I love the first two Alien movies, BioShock is just amazingly atmospheric – I’ve been afraid to enter rooms due to the psychotic ramblings that you can hear outside, and the older atmospheric games (7th Guest and 11th hour) and of course the original Resident Evil on the original Play Station. Playing that on the dark was seriously spooky!
The building I work in is an old school. During the day it’s an open place with lots of light. Early morning or late afternoon on the other hand its a shadowy place, full of echos and has a decidedly spooky feel!