Nothing is original anymore. Creative content is based on an innate knowledge of life experiences. Pretty much anything you create is going to be influenced by something that has come before. It's gonna be either subconsciously influenced or blatantly inspired by things you have experienced. Tarantino is a master at recognizing art for what it is and putting his own creative spin on it. He has never directly copied other peoples work, but has allowed it to influence his style and creative vision. That makes him successful...not a hack...in my opinion.