Thats a good category to put mothman in =). Never saw butterfly effect cause I didn't think ashton could pull off a serious acting role, but I'll give it a try. Memento is definitely very good, The Game is good, and so is Mystic River. I didn't care for Secret Window cause what I expected to happen pretty much happened, and Jeepers creepers I thought was just a lame monster movie (no offense to you), BUT, I will admit that Jeepers Creepers 1 does contain one my top ten scary scenes in a movie - in the very beginning of the movie when they are driving on the highway and they pass the scary guy after he has stopped at his house, he stares at them and seems to be able to constantly face them without turning his body - its hard to explain but if you watch it i think you'll know what I'm talking about. I love those subtle scary things a lot more than the startling scary things, and thats why I recommended Mothman Prophecies.
One "Mind F**k" movie I would add to your list is Donnie Darko. That movie messed me up, but I liked it, and would recommend people seeing it. As long as I'm recommending movies, I think Requiem for a Dream is a powerful movie and I really enjoyed it. I think it has a unique cinematography style that I find awesome. Just don't watch it if you are depressed cause it won't cheer you up =).
JJ