Blade Runner (1982)
Based on the novel:
Do Androids Dream of Electric Sheep? (1968) by Philip K. Dick
All these sci-fi movies are based on books (no comics; titles descended by release year). When you love a book, few things are more exciting than seeing it turned into a movie. When you initially love a movie, it's never late to know how all the things were on the page...
Discuss here after voting.
Another half of this poll (dystopia, apocalyptic, horror) is available for additional voting.