Yeah I'm going off of initial experiences because none of the movies on my list "scare" me anymore. Halloween is my fav horror movie of all time and I think it's the greatest but it doesn't scare me at all, so most of my stuff is based on the initial viewing. Halloween scared the shyt out of me as a kid, just the music alone. Jaws still has me shook to go into a body of water, The Haunting made me afraid to walk down the stairs in my house, Nightmare had me afraid to go to sleep, Suspira just amazed me, Texas Chainsaw unnerved the fukk out of me on first viewing, Psycho had me afraid to take a shower
Thats the main reason why I refuse to watch Psycho. It got me scared of taking showers after seeing only that one scene.
It's on my to watch list. Don't hold it against me if I chicken out though. I've been traumatized for long enough already with only seeing one scene. Poking my head out of the shower every 2 minutes to make sure no one came into my bathroom isn't fun.
I feel you breh. I know exactly how you feel. Just make sure to stay clear of this thread when we start talking about it because you know there won't be spoiler tabs
but the flicks you listed are still quality breh. Don't sell yourself short. I just didn't want to make my list an exercise in picking the standard greats (although that's kinda what happened minus Paranormal activity) and pick some shyt that really affected me. 
....the top 5 movies, legit scared me and its mostly cuz i was a kid when i saw em 
but anyway, here we go:
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