Okay, if directors were big in 1975 or earlier, then you gotta name who your favorite is. If you say Lucas or Spielberg, you gotta pick an extra one. If you can't name any, you have to see three movies on IMDb's top 250 list (or something...jeez, get some culture).
DISCLAIMER: This is just armchair observation, not the result of many hours of deliberate study of the subject. I'm by no means an expert, but just an ignorant hick who's putting his two cents in. For that and a nickel, you can have a cup of coffee.