My Best Fiend (1999)

Herzog on Klaus Kinski, the volcanic actor he made five films with, starting with Aguirre. It is part memoir, part exorcism: Herzog revisits their tumultuous, productive partnership, including the oft-repeated story of threatening to shoot Kinski if he walked off the Aguirre shoot. It is very funny and quietly affectionate, and you should take Herzog's version of events as one side of a famously two-sided relationship. Seeing at least Aguirre or Fitzcarraldo first makes it far richer.