Being, I guess, of the "older generation" (I guess I made it), I like older horror movies. I'm talking about the older Universal and Hammer "creature features". Frankenstein and the Wolfman scared the crap out of me. Yet so did Margaret Hamilton in Wizard of Oz! Gave me nightmares.
The very first Night Of The Living Dead (1968) was good.
Later on, it was the Exorcist.
I have no desire to ever watch slasher films, or any of the current movies that are, IMO, sadistic and very graphic with gore. Movies like Saw, etc. I personally have a hard time with people that find enjoyment with watching these types of movies. But that is just me.
The creature in The Unnameable scared me pretty good....
H.P Lovecraft came up with some pretty wild concepts.