I have a love/hate relationship with serial killer / serial torture movies. Okay, it's mostly love, because I love thrillers in general and I don't have a weak stomach when it comes to movies. But there have been a few in this genre that I found terrifically unsettling and that I wasn't ready to return to for a long while. Seven got to me in that way when I first watched it, which was probably a couple of years after it was released. I never saw it at a theater, and I'm thinking my first shot at it might have been on cable. I do have the Blu-ray now.
The one with Denzel and Jolie did that to me. What was it called? Why don't I just look it up? Ah yes, The Bone Collector. There's another one, too, that I'm so vague on I'll have to do a little sleuthing to identify it.
Hell, Silence of the Lambs, which I saw in its first week, affected me that way at first... and it's one of my favorite films. I'm past that now, but for a while whenever I'd return to it, it was with a slight feeling of dread.
Go figure. Because in general, I can watch anything.