I find it hard to be scared these days, I'd probably say something like Martyrs due to it being a bit of a mindfuck. Films like Paranormal Activity always promise but never deliver. Blair Witch Project was only scary at the very end, plus the fact a weird man was staring through our window at the time (long story).
Give me E.T. (the original puppet, not that CGI crap) or Ghost Chase (http://www.imdb.com/title/tt0093201/) now they are scary films.