I'm sure some of you know that I recently got my first IT job at a help desk. Today was my 5th day. Looking around me, a few people from our training class seem to have made good buddies with the boss

I have introduced myself to him and let him know how excited I am to be working here and such, however, I never find myself over there joking and laughing with him like a few of the other guys... Should I join in so soon? Or should I wait until we go live on the phones and show my chops first (my performance) and THEN make buddies with him?