I'm not a big fan of horror in general, but I think it's modern horror in general that I have a problem with. See, old-school horror wanted to scare you with monsters or aliens - things that aren't real - and let you get on with your life afterwards. You get a good scare, but you can let it go because it is so clearly fiction that it doesn't really stick with you. Modern horror, on the other hand, wants to be completely plausible, get right down there inside your head and settle in for the rest of your natural life, burning in the impression that, with just a tiny little push, your life could be precisely this horrifying, not even kidding a little bit. Old-school horror wanted to give your heart a little shot of adrenaline. Modern horror wants you to have PTSD. Forever.
Mokalus of Borg
PS - Oh, and the authors are really good at it, too.
PPS - I suppose I could desensitise myself, but that seems like a lot of work for a small payoff.