My original aim to us Facebook is to make reunion to my old school-mates and friends. It works (though I find some of my friends are very reluctant to open a Facebook account).
Now, I nearly log on Facebook every day. I find that my friends' activities are quite "strange":
- a few (less than 10%) are very active and makes postings every day
- many behave like a whale (surfacing to water a moment, makes comments) and disappear for months
- half of them actively play FB games (though I never try one)
Somehow, to my disappointment, I find that the posting on FB is just on acquaintance level and the communication level is very superficial.