People on Chatimity are nicer. Its unique Nice Point system encourages well-behaving people to stay and makes bad guys leave. It is also easy to distinguish nicer people. Color of a user's name is based on his/her Nice Points.
How is niceness of a user measured?
You earn Nice Points on getting added as friend, on posting good messages and consistently being nice to others. You loose points on using offensive language, on getting flagged for offending others or blocked by others. Chatimity is automatically moderated based on Nice Points.