

David is not too bright and his trademark gesture is to remove his cap whenever he meets another person.
His grasp of the world is essentially childlike and he once famously gave house room to a large ventriloquist's dummy. Vernon Scripps was not amused.
David's moral values are strong, but he is easily confused by counter-argument (especially by Peggy) and can be drawn into schemes about which he remains dubious. Peggy constantly draws David into her schemes, but does not exploit him.
His emotions are never far from the surface. David has great affection for his dog, Deefer, who remains a loyal friend. deefer is so named because it's "D for dog".