Mine still remains to be the 1931 original, "Frankenstein," starring Boris Karloff.
The Changeling with George C Scott.
Never seen many horror movies and those I've seen never frightened me....
It has to be this , it can still Freak me out now , when it crawls thru the TV screen
I could not stay in my front room in the dark for days
Most Asian Horror is serious White Knuckle viewing , guess that's why I Love it and have watched so many
Pet Sematary 1989
Salems Lot (1979) I was 6 when I first watched it with my older Brother and I literally had nightmares for years. lol
My blood still runs cold when Barlow appears in the Jail cell!!