Answer
AllMovie, a movie website, called John Cassavetes an iconoclastic maverick. An iconoclastic maverick is a person who is unconventional and rebellious, and who does not conform to the usual standards. Cassavetes was known for his unconventional style of filmmaking, which often featured long, uncut takes and improvisational dialogue. He was also a vocal critic of the Hollywood studio system, and his films often dealt with social and political issues.