In his autobiography, Pat O'Brien described his character in The Personality Kid as a "Cassius Clay" type (this of course, was before Clay metamorphosed into Muhammad Ali). Indeed, arrogant prizefighter Ritzy (Pat O'Brien) is quite a piece of work, wearing a derby hat in the ring and dancing an Irish jig whenever he scores a knockout. Once he's risen to the top of his profession, Ritzy becomes even more insufferable, forsaking his faithful manager-wife Joan (Glenda Farrell) in favor of society artist Patricia (Claire Dodd). Ultimately he discovers that he'd be nowhere without Joan, who's been arranging "bum a month" boxing matches to guide him towards the championship. Only when he's hit the skids, however, does Ritzy return to Joan -- just in time to learn of another surprise in store for him, courtesy of "Mr. Stork."