I think maybe FB works best for big city people who are separated from family members for many years and have hundreds of friends and acquaintances from social and professional lives that they actually like.
That would be me. I moved from MN. to Los Angeles 30 years ago and I have 35 first cousins, (all grown with families of their own for most part), and I like nearly all of them. We spent a lot of time together growing up. I've also met so many people over the years that I really like but to stay in touch in the real world is not going to happen. FB is the perfect level of contact and I get to see what's going on with people, if I want to.
