These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Blade Runner
Cult Classic: Has become so ubiquitous in pop culture that it's hard to picture now, but at one time the film was very much this.
Death of the Author: One of the reasons Deckard's being a replicant or not is still hotly debated is because no definite answer was given in the film, and the multiple script writers give contradictory answers when asked.
Genre Turning Point: The film's unique and widely praised visualization of the future was not only widely copied by other films (sci-fi and otherwise), it either influenced or anticipated the way large cities would look, particularly at night, in the early 21st century.
Harsher in Hindsight: The "Blade Runner Curse" is a bit of folklore developed around the film centered on how many of the companies with proeminent Product Placement in the film would go bankrupt or go through disastrous setbacks in the following decade:
Coca-Cola launched the infamous New Coke shortly after the movie was released, but managed to survive anyway.
Bell was broken up for monopolistic practices.
Cuisinart went bankrupt and was bought out by a rival company, living on only as a brand name.
RCA (big neon sign out Deckard's apartment window), as a company, bit the dust in '86. (The name is still trademarked by Technicolor, however, and sometimes used on products that come from its licensees.)
Polaroid photos are seen in the movie — the Polaroid company still exists today but has ceased making cameras and film.
TDK, whose sign appears on the building opposite the Bradbury near the end, seems to have made it through more or less OK—although its sign is partially obscured.
The unicorn from Deckard's dream sequence. It was supposed to be terrifying, but Roy Batty chasing after Deckard, howling like a wolf, and smashing his head through walls like a cartoon character? Amusing.
Roy biting his own fist.
The dying Pris thrashing on her back as if she's throwing a temper tantrum. Even between viewings, this scene doesn't necessarily age well. It does not help that the female stunt actress was too exhausted to do the preceding scenes and they had to get a man in poor makeup to do it.
No Problem With Licensed Games: Westwood Studios released a lovingly faithful Adventure Game based on this movie in 1997. The game featured randomized plot points and the player's actions could lead the game towards thirteen different alternate endings.
Seinfeld Is Unfunny: Giant buildings, neon lights, multicultural cities, film noir aesthetics, and lots and lots of rain? Meh, we've seen it all before.
The skies above Batty when he releases the dove were supposed to be grimly grey, causing an unintended Cue the Sun moment. This was changed in the 2007 "Final Cut." Crew members stated in a behind-the-scenes documentary that this error occurred because they couldn't get the dove to fly in the rain. The water soaked the bird's feathers and made it too heavy to take off, so they eventually had to resort to filming the scene without the rain.
When Graf and Deckard first take off in the spinner (flying police car), two of the cables lifting the car up are clearly visible.
Uncanny Valley: Sebastian's toys are played by little people in prosthetics, and make some very inhuman, jerky movements. The replicants avert this trope as they are so human, physically and emotionally, but the scene where Pris disguises herself as one of the toys has her wearing some pretty Uncanny Valley Makeup.
Vindicated by History: Upon its initial release, the film was met with mixed reviews and an underwhelming box office performance. In the ensuing years it became a Cult Classic, and is now generally considered one of the greatest science fiction films of all time.