My two cents... I agree with the comment above that people 'scare' differently. What I really love is the imagination that shines in some of today's best 'dark' adventure or science-fiction films that get labeled as 'horror'.
Okay, going to show my age here. Last movie to 'scare' me was the original Blob with Steve McQueen,
http://www.youtube.com/watch?v=XhyRpvgm03g -- I was eight years old and saw the movie in a theater much like the one that appears in the movie towards the end. LOL. There was even a diner up the street exactly like the one in the final scenes, place was North Canton, Ohio and the year was 1958. Those that know N. Canton (in the 1950's) will remember such locations.
I loved 'horror' as a kid, but for me it has always been more like 'dark' adventure or science-fiction then 'horror', Black Sunday and the Hammer Films... loved 'em. But I was already a non-believer in fairy tales and religious icons (like the devil) by the age of twelve and by the late 1960's I was doing large amounts of LSD and staying over night, alone in supposedly haunted houses... desperately seeking ghosts (I scoff intensely). It was the times. LOL. Exorcist did nothing for me. Most slasher films have me wondering why the victims were so stupid...
True, there are movies that can make me very uncomfortable, like Audition (which is the rare 'torture' film that I do recommend) but most Torture Porn films or films that have rape or molestation (I get angry cause I want to come to the rescue and cannot -- while being forced to watch on a screen -- largely due to the I-hate-torture aspect of my personality)... I still love 'dark' adventure and science-fiction or horror films but gore for the sake of gore is boring...
I guess, it comes down to perspective. And everyone has a different perspective. But the movies on that list... Jaws, Alien are awesome films -- very well done. The Haunting and the low budget Carnival of Souls were clever. Hell House and Rosemary's Baby, the novels is better. Everything else? Not so much... My two cents...