 Guests on "Mister Rogers' Neighborhood" were often surprised to find that although Rogers was just as gentle and patient in life as on television, he was nevertheless a perfectionist who did not allow "shoddy" ad-libbing; he believed that children were thoughtful people who deserved programming as good as anything produced for adults on television.Rogers appeared as a guest on some other series.On the children's animated cartoon series "Arthur", for example, Rogers plays himself as an aardvark like Arthur.