I thought the acting in Paranormal Activity was really bad. And also, the guy had like no reason for wanting to film so much. It took away from the experience and made it seem unnatural. In Blair Witch the girl had the excuse that it was the only thing keeping her calm.
Also if the couple from the movie were real, and I met em, I'd probably hate them... or at least hate the guy because he is so willfully stupid. I hate movies where characters are willfully stupid, and make stupid actions for no reasons. I find it lazy on the directors part for not being able to make it seem more natural. Blaaargh!!
Also, the movie didn't scare me at all
I like being scared. Hm.