Quentin Tarantino says he wants to retire from movie-making after just 10 films, but there are plenty of veteran directors who have proved it's possible to keep their creative spark alive well into old age. While Tarantino places a lot of emphasis on the legacy of his restricted filmography, other directors managed to carve out careers of both quantity and quality. Some of the greatest directors ever have honed their craft across dozens of feature films, and this variety has given their careers an interesting sense of evolution, experimentation, and reinvention. Although Tarantino plans to only direct one more feature...