Bingowings said:
Artoo display or at least appear to display a range of emotional responses.
Fear, concern for Luke and even recognition of Obi-Wan and the completion of his mission.
He later shows concern for Threepio.
He has much more of an acting range than even Ewan McGregor in the PT.
Very funny and very true!
(love your new avatar and matching quote by the way!)