I quit Facebook over privacy concerns.
My email inbox in considerably quieter, I like that. There were some people I was keeping in touch with only through Facebook, I do miss that.
Overall, this has been a good decision I think. Even setting aside the privacy issues, Facebook was becoming a noisy, spamming headache that demanded constant attention. This was even not playing all the insipid games that tried to further encroach on your personal data!
I hope that the people who really want to stay in touch with me will do so through this blog.