"Why I Am Not a Painter" is written in free verse and divided into an introductory stanza of three lines, followed by two stanzas of thirteen lines each. While free verse, which has no regular meter or line length, has been the most common form of twentieth-century poetry, what made this poem—and O'Hara's work in general—stand out in the 1950s is the degree of freedom with which O'Hara wrote his poetry. As it was, O'Hara disliked many of the most common poetic qualities and techniques.