Are there any out there that still scare you even though you have seen them a million times? For me it's the original Halloween. I had the unfortunate luck to see it when I was eight and it left me traumatized till I was 13, I couldn't fall asleep at night by myself with out the TV on...

 

The original Black Christmas, sometimes called something else that I do not recall, I have never seen the remake and do not care to but the original is still scary mostly because of how it ends.

 

If you exclude Arachnophobia from the mix, since I'm afraid of spiders, I can't really think of any. Once I've seen it once most films lose all their scariness. If I expect what's coming I can't set myself up to be properly afraid... It sucks >_>.

 

I saw Silence of the Lambs when I was 10 for the first time. Still freaks me the fuck out.