Facebook allows me to...
1. Post photos in a nice easy to use format that most of my friends can see.
2. Keep up to date with the Fat Chocobos Free Company & Linkshell.
2a. Keep up to date with the Fat Chocobos Free Company & Linkshell's leaders.
2b. Keep up to date with the Fat Chocobos Free Company & Linkshell's gardeners.
3. Keep up with family at the other end of the world.
4. Keep up with friends from high school.
5. Keep up with friends from work.
6. Keep up with friends from Danielle's work.
7. Keep up with EoFFers.
8. Keep up with old EoFFers that don't frequent EoFF anymore, occasionally dragging them back to EoFF.
9. Keep up with old friends like ex-neighbours and ex-workmates and ex-holiday-peoples and whatnot.
10. Get to know all of the above people better.
11. Send links and reminders to Danielle.
12. Keep up with EoFF's articles and whatnot.
13. Promote EoFF.
14. Organise people ahead of, during or after meetups/parties/whatever.
As for the whole "urgh family" thing, don't you guys set up groups for family/EoFF/work/etc? If I don't want someone to see something I don't let them see it.