Civility, kindness, a sense of humour and proportion in editing seem critical. The most intelligent of my pet rats had a sense of humour, knew how to play with and tease even human beings, seemed to love each other, cared about the ones who were ill, and grieved for the ones who died. I guess we should be able to do as much.
Userboxes
This user has been identified as an Awesome Wikipedian and was awarded his or her own day.