I'm still scarred by The Ring. Has a bit to do with when I was young, my sister woke me up in the middle of the night by flicking on the lights, with wet hair and in a white night gown. Slept with the lights on for a week after.
I've never actually seen any of these. I kind of fell off with horror movies back in high school but I think of all of these, I am most haunted by the premise of Saw just because of how demented it is.