Originally Posted by zombievictim
Your idea of a horror movie spans much wider than my own. MUCH wider.
Most of them are definitely horror flicks but I will admit that a few of them skirt the line of being horror or just being a thriller (Mr. Brooks, Vacancy, ect.).
Two great movies that I almost included but didn't since they are too on the line are Shutter Island and Zodiac. Especially Zodiac. Shutter Island at least has some frightening moments at least but Zodiac was definitely more of a thriller. Another movie I didn't include that's right on the line is Black Swan. It's a psychological thriller but there are definitely horror elements/scenes in it.