What are the characteristics of Walter in "The Secret Life of Walter Mitty"?

Walter Mitty is a meek, mild-mannered little man, a
milquetoast character who is completely dominated by his wife. It is a classic role
reversal where Mrs. Mitty figuratively wears the pants in the family, and Walter is her
subserviant minion. Walter is forgetful; he has to be reminded constantly by his wife of
what his next step must be. He is incompetent--a poor driver and incapable of the fairly
routine procedure of removing his snow chains. He talks to himself, bringing laughter
when he blurts out "puppy biscuits" on the busy sidewalk. However, he is a colossal
dreamer, master of all the daydreams in which he stars. It is his way of escaping his
nagging wife and the dreary routine of his unhappy, little life in which he is--unlike
his daydreams--always Walter Mitty, the defeated.