Especially in a new crowd I usually sit quietly, listening and observing others. I may take part in conversations but I have no interest in chitchat, I see no reason to speak if there's nothing to say. And there is no such thing as awkward silence.
Also I'm the guy who's probably there when you need help moving the couch or a ride to the station.
That's really all I know how to tell about myself... atleast for now