I have FB because my daughter has an account, plus when she was in show choir there was a group page where all the info was posted. I don't post much but my friends do, so it's fun to keep up with what they're doing. I also receive postings from bands that I like, shows that I watch, etc. Even my church has a group page!

Personally I can take it or leave it. When I was really depressed I wouldn't even get on the computer, much less FB. Now that I'm doing better I treat it like the tool it is. I'm on my class group page, but they mainly talk about meeting up at a bar that I'm 2000 miles away from so it's not really interesting.