Moovies

So attempting to go see The Strangers tonight,
I'll try and review it tomorrow.
It's been a while since I saw a really scary movie,
but that's probably because when me and Trampis and Collin had
our horror movie-thon in Montreal,
it was all three of us,
and we tend to just make fun of shitty movies (which most horrors are, excluding a few)
Some of my favorite movies that ACTUALLY scared the shit out of me:
Saw (all of them)
Hostel 1 n 2
Mothman Prophecies
The Omen - new one more so, 'cause I watched it alone
The 6th Sense (I don't know okay, it was freeky!)
Signs - those Aliens are FUCKING SCARY MAN
Gremlins - saw it was a kid...scared me!
and just for fun
Fatal Frame was actually a terrifying game.
I could barely watch it being played and there were three of us!!!
Anyways, what are you favorite scary movies?
Is there some sort of mold to create scary movies out of,
or is it possible to make any movie scary?
Can normal movies be scary, or does there have to be monsters, aliens or the paranormal?
I have friends who are stone cold to any movie except possession flicks (Exorcism movies basically) are possession flicks really the scariest?