I left Facebook because they have unlimited rights to commercially exploit every word and image you post. Post a picture of your kid? You could find that image selling stuff or promoting religious claptrap.
I quit facebook because of the privacy issues. It was nice having a way to connect with s handful of friends, close and far. But the idea of facebook tracking me even when not signed on creeped me out. I don't know if they actually did that, but talk of same was the last straw. In addition, facebook kept trying to get me to friend people who I had no idea who they were, or why. Having friends who don't know each other, and have nothing in common except through me, friend each other, is also kind of creepy. In fact, the program was nagging me to friend strangers. I miss being able to update with those few friends. I value my privacy. Giving "big brother" even more access to my life was too much. To hell with facebook.
My family and friends are spread pretty much around the country and world so its nice to see the latest photos and see what they are doing I love it.