What do you think of ''shaky camera'' movies?

The type of movie which you see directly filmed through a camera, in which the events are usually filmed by a character or several characters in the movie. Some notable examples are The Blair Witch Project, the Rec movies, and Paranormal Activity.
These strive to reach a new height in giving the viewer a sense of genuine realism, and some work, some don’t. For me it all depends on the events depicted in the movie, and if it seems plausible that someone would actually film everything. The technique has to accommodate the content and make it plausible, otherwise I get real irritated.
Blair Witch makes sense, as did Paranormal Activity, and that last one helped with having security cameras that watch constantly, so that takes away some of the absurdity of someone filming shocking and frightening events that, in real life, most people would be too scared to do.
Sometimes it gets annoying. Zombie movies have fallen prey to this a lot. Rec, Zombie Diaries, Diary of the Dead…I like these movies, but sometimes all this bugs me. I want to see detail, not just shaking cameras and blurs when something cool is happening.
I understand the look, feel and intent these go for, and I find it interesting. Except there are so many of these now that I find myself going, oh no, not another shaky camera movie…It’s not always pleasing to the eye, and it doesn’t always go kindly with the subject matter. I realize, during a war, you always have some people who’s job is to record everything…but seriously, if my town gets invaded with zombies, getting everything on film is the last of my damn worries.
What are your thoughts on this? What types of shaky camera movies have you seen, and do you like it?

also Imma hurl the next time I hear someone say, ’‘will you turn that damn thing off?!’’