I watched a couple of horror movies when I was young, without my parental permission. They did give me the odd nightmare. I think it was Alien, Jaws, Night of the Demon.
But horrors bored me when getting older. Psychological horror pulled my strings more. Like the boy in Flatliners, that sort of horror.
But then I found japanese horror movies and the women of Ringu and Ju-on brought the terror back.