You’ll love what someone considers as constituting the “ultimate” collection of science fiction movies:
Escape From New York, Mad Max, Rollerball (the original, I’m assuming), The Abyss, Alien, Aliens, The Day the Earth Stood Still, Fantastic Voyage, The Fly (not sure which one), Independence Day, Journey to Center of the Earth, The Neptune Factor, Planet of the Apes, and Voyage to the Bottom of the Sea.
And that’s it. Regardless of what you might think of any of these movies individually, for good or ill, we now know that together, they comprise the only science fiction flicks you ever need to see.
Twenty discs of definitive sciffy. Our overlords have spoken.