As someone born in the mid/80s, I think all my coming of age horror movies (Scream, Saw, Etc) have desensitized me to classic horror movies. I’ve watched them all and find none of them scary. I voted for The Shining because it’s my favorite on the list, but it is by no means scary to me.
Legit scary movies for me are Pet Semetary and What Lies Beneath.
Agree on Pet Semetary.
The Insidious movies really scared me as an adult. My wife loves watching me more than the movies during that kind of stuff.