[quote=Rusalka]
Well the thing with Paranormal Activity is I actually experienced that stuff in my old house, so I know alot how that goes. Plus PA for me was good because it knew how to build the tension to the point of making you jump at just a little sound or disturbance. Oh and HELLS YEAH to Fatal Frame 2
[/quote]

If you want tension, the first Halloween is a good choice. The original, that is. Or watch The Descent. But not the sequel. Or pick a Hitchcock movie. Or do what I do and watch Audition again. Kirikirikirikiri. 

Audition is an excellent movie for tension building in horror films. The whole movie is a build to the final scenes, but the way it builds them is genuinely unnerving. You never know what is truly going on, only that something is very suspicious. And then that last ten minutes happens and it's so good.