I left FB a year back and I haven't looked back since!
I always loved playing video games and when I was on FB I was 'full on' into gaming but man, I NEVER understood why people played those retarded games(Farmville, MW, Potville!! Lol). They're so BORING! I don't understand some people when they tell me they are 'so addicted to Mafia wars, you SO have to join too!'
And besides, my FB account was like another 'ego' I had to 'maintain' and tend to from time to time. Having one 'real' ego to handle is challenging enough, thank you very much
People called me a coward for leaving and some claimed that I only left because I wasn't 'popular' on FB, and my 'profile was lame and boring'. And...that was true to an extent and I'm glad it was that way, because I'm very happy to have left. I felt like HAD to keep up with all those people on my friends list by showing how smart/funny/pretty and popular I am through the various apps available on FB. It kept my focus away from what was important and relevant to me at that time.
FB now seems worse. It encourages people to be shallow and superficial. And by people I mean 'sheeple'
(I don't mean to judge, but it's just a pattern I've noticed in many on FB, especially of my then age group, the teenagers). Because I've seen many use it in constructive ways and meaningful ways. Although for most it's all about portraying themselves to be good looking, well off and for pointless 'socializing'.
One thing I missed about FB was all the awesome/inspirational status updates my friends from this forum and others like them used to put up. But after a while I felt you can connect with people online in meaningful ways even without FB.