In his biography of Chayefsky's friend Bob Fosse, drama critic Martin Gottfried said Chayefsky was compact and burly in the bulky way of a schoolyard athlete, with thick dark hair and a bent nose that could pass for a streetfighter's. He was a grown-up with one foot in the boys' clubs of his city youth, a street snob who would not allow the loss of his nostalgia. He was an intellectual competitor, always spoiling for a political argument or a philosophical argument, or any exchange over any issue, changing sides for the fun of the fray. A liberal, he was annoyed by liberals; a proud Jew, he wouldn't let anyone call him a "Jewish writer".In his biography "Mad as Hell", author Shaun Considine says that Chayefsky had a "dual personality". Chayefsky's "Paddy" persona had "character, caprice; it appealed to his sense of swagger" and gave him confidence to stand up for his rights. "Sidney" was the "silent creator" who had the talent and genius.