I'm much more about the Twitter now. Facebook has just got too full of other crap. I don't want to know that people have received fortune cookies, which awkward moments they identify with, or what their daily horoscope says.
You don't get as much of that on Twitter. (Spam followers, yes, but I'm developing a strategy to deal with those.)
So as I become a post-Facebook web-user, this cartoon resonated with me.