Those Amityville's were scary. Anything like that scares me. I hate watching them. (yet somehow I still do) Ghosts, paranormal stuff, those jerky movement scenes where things walk on the walls and ceilings...
Nightmare on Elm street's were scary, because you had no choice but to go to sleep.
Pennywise the clown is a terrifying thing, though I never noticed just how scary until I watched it with my son again, looking at it from his pov. He still sleeps with the light on.
I love the Alien movies. All of them. I saw Aliens when I was eleven, with my dad whom I had just met. I slept with my grandmother all summer ;)
Shelby, I love the Thing. (of course I do... I love Kurt Russel!) I also loved the movie itself, though, and I cannot wait to see the new one.
Peace,
Tammy