In horror? My favorite is The Thing. Always has been. I love a good psychological horror. You don't have to do blood, guts, and the like to show a good horror film/story. Hell, you don't even need dialogue for the best ones. The Thing was perfect psychological horror, especially the end, where the two survivors, not knowing if they're part of the Thing, shared a scotch, waiting to die. The entire film was hauntingly-beautiful from start to finish.
The horror film that scared me the absolute most? MIRRORs with Kiefer Sutherland of 24 fame (that's why I wanted to watch it). I couldn't muster the courage to look in a mirror for a year after watching it. Yes, there was gore, but that wasn't the reason I was scared; it took something mundane and made it a scary-as-shit concept, much like Stephen King did with cellphones, like Poe did with a black cat. I can always appreciate a horror film like that.
The movie is titled Cannibal Holocaust. It was filmed in the Amazon jungle back in 1985 by an Italian movie outfit... but the actors speak English in the movie.
Be warned... there is some SERIOUSLY fucked up shit in this thing. Shocking. Lots of full nudity too. I can honestly say that it is one of the most fucked-up movies I've ever seen, if not The Most fucked-up. Solely because of that... I'm giving it a 9.99.
You have been WARNED!
But yeah, fuck Cannibal Holocaust, and fuck Ruggero Deodaro (the director). Not only is it a racist stereotype of two tribes that actually do exist and don't partake in cannibalism (because, while made-up things may not sound as good, at least you aren't insulting a whole existing ethnic culture with that.), but seven animals were brutally killed on-screen. Two monkeys were killed because the first one didn't apparently "do the right take". All of those animals died in agony because
apparently, they're all going to die, so why treat them humanely, right?
Great concept that did the whole camera film stuff well, but the director has no fucking heart, no fucking soul. He definitely deserved the jail time he got for animal cruelty.