I mainly use fb for subscribtions of various on-line mags that I read. Good for picking up chicks and of course making other people jealous and angry (these who have it worse than you do), the later is pretty much a basis of fb. A good way of contacting some people too, obviously. Yet I've never understood the satisfaction of posting all the private details of ones life, never posted anything too private myself, nor I will, as I like my privacy which is becoming harder to keep and it just makes no sense in general.