I like old zombie movies like anything by George Romero before he made Land of the Dead and that garbage after it. I also love those cheesy Italian zombie movies like Zombie and Hell of the Living Dead.
Old Stephen King horror movies like Carrie, The Shining, and Children of the Corn are a winner for me.
Japanese horror movies Ju On and Ju On 2.
Jeepers Creepers is good and it was filmed in Georgia in a town not far from where I lived.
Pumpkinhead was good too.
I aldo like black and white classics like Night of tje Living Dead, Carnival of Souls, Nosferatu, Psycho, and House on Haunted Hill.
But every true horror classic tends to get ruined by crappy sequels and remakes.
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The only ones I've seen from that list are the Stephen King films and Psycho. I haven't seen much of anything in the past 30 years or so.