::SIGNS SPOILERS::
Speaking of M. Night Shyamalan, I didn't like Signs much at all. :/ The movie was good (wasn't scary at all, I don't know what you guys are talking about), but I absolutely loathed the ending. Not only was it way too preachy for me, but the way EVERYTHING came together just to save the kid was cheesy for me and broke the whole mood of the film. I DID love The Sixth Sense, though- incredibly good movie, with a great plot twist, especially if you watch the extra features on the DVD. I have yet to see Unbreakable, but a friend of mine who's opinion I trust very much said he liked it better than The Sixth Sense.
Also, everyone should see Narc, I don't care who you are- just see it!