Psychological drama

I rarely watch a real horror movie. The blood and gore genre just has no appeal. I don't feel afraid, but I do feel revolted at the "carnage for money" aspect.

But movies of people falling apart, "Leaving Las Vegas" or "Trainspotting" which are psychological horror movies, these movies grip me. These are the movie genre where the villain is the little voice in the protagonists head "one more drink" or "shoot up one more time" ; these movies both frighten and fascinate me. You can argue that either of these movies glorifies drug or alcohol use, but frankly both of them should scare people away from abuse of drugs or alcohol IMHO.

I think it's because I am convinced that nearly everyone is just a few small steps away from doing things that they might consider reprehensible. All that's required is just one push in a certain direction. It might take a brain injury, lowered serotonin levels, fear, boredom, or just loneliness to drive very ordinary people into doing very strange things.

How far away from doing something "out of character" are you?