Gotta go with aliens. Empire is classic but aliens compared to the original just crushes it. The pacing, no false steps, it's kinetic, action scenes still hold up. Aliens might be the Pinnacle of film science fiction. There's no weak points or characters, everyone is acting by their motives, then go through a 3 stage story structure no real twists or aas pulls empire has some weaknesses, like the emperor with know who luke was just by his last name, everyone would have a good idea, yeah this is Anakin Skywalker son from the clone wars.