I'm going to give Paranormal Activity a 9/10.
I've never really liked movies that are shot through a video camera, but this one I can say is pretty decent, especially for a low budget film.
It helped it feel like it was real and the acting was fairly decent.
I can't say it was the best horror movie in a long time, like many others have stated, but everyone is entitled to their own opinion.
Overall the movie could have been slightly longer, with a bit more story added into it, and in some parts it could of had some better acting, especially on the part of Micah. Just some parts of the way he acted and spoke didn't seem very realistic to me.
Again, it's a great movie and worth watching.
I think for people who keep saying that it's boring, I think the simple fact is, you don't have the patience to watch it and take in anything that's happening. Unfortunately, a lot of people just want jump scares and aren't interested in the stories movies tell.