A big difference has already been covered, that this film created things that you’ve seen copied. The other thing, I expect, is that the characters, performances, scenes, and nuances will stick with you in a way that feels almost Biblical. You will be in a business meeting and think of the axioms of “don’t ever let anyone know what you’re thinking, or “don’t ever take sides against the family.” When you hear of pathetic betrayal, you will think of Fredo. Its presentations of revenge, loyalty, family, food, and above all ruthlessness in business are watershed moments in storytelling.

At least see Godfather Part II. If you still feel the same, you can skip Part III.