what's your one "movie from the last 30 years that everyone in the world has seen", but you haven't?

Alien or any of the others.

Home alone or any of its variants

Looking at Box Office Mojo’s list of top grossing domestic films, I’ve only seen 3 of the top 20 that are of the last 30 years. So from Avatar to The Hunger Games: Catching Fire, there’s just so many I don’t care to ever see.

The adjusted gross is probably better to look at.

Another “The Big Lebowski.” I’m working on it, I swear!

Harry Potter and its sequels. I tried to watch the original, but fell asleep.

Most recently, I’ve managed to live without seeing "Avengers: Infinity War, which the rest of the world apparently saw given the box office.

Finally saw “The Godfather” this year (that Al Pacino didn’t get the Oscar that year is a crime).

Jurassic Park

The only movie I can think about that is huge and I haven’t seen is The Exorcist, and that’s way older than 30 years ago. I’ve seen a vast majority of the IMDB top 250.

Titanic and the third LotR movie.

Shawshank Redemption.
Sentimental prison escape movie? With Morgan Freeman? Just sounds too sugary for me.

E. T. Never saw it, never wanted to.

Not for this purpose, really - the inflation adjustment bumps too many pre-1988 movies to the top of the list, and you’ve just got to sort them out again. (ETA:) The top 50 grossing movies in unadjusted dollars only include 2 pre-1988 movies: Star Wars and E.T.

Any of the Star Wars movies, any of the Indiana Jones movies, ET, Titanic, any Hollywood movie released in the past decade. Add anything Hollywood produced worth watching and I’ll expand my list to the last two decades.

Looking at the list of top-grossing movies, and excluding Star Wars and E.T., it’s more what have I seen, than what haven’t I. Haven’t seen Avatar or Black Panther or Wonder Woman or Titanic or any of the Dark Knight movies or anything with ‘Avengers’ that isn’t about Emma Peel and John Steed; no Hunger Games, Captain America, or Jurassic World movies, you get the idea.

Hard to pick just one. I guess I’ll go with Aladdin, though I haven’t seen several movies that had higher gross receipts like Jurassic World, Black Panther, both Avengers movies, and The Incredibles 2.

Pretty much nothing that came out in the last 10 years. I’m not purposely avoiding the cinema–I just don’t feel like going to it lately. I may have seen some of them streaming, but I don’t like superhero comics movies, so I’ve seen none of those, which apparently have been the thing in that time period. I never saw Titanic. E.T I only finally got around to watching two years ago. I wanted to see Avatar, but also didn’t get around to it. Never seen any of the Lord of the Rings movies. I think I’ve seen most of the others mentioned in this thread, though (seen the first Matrix, Big Lebowski, Pulp Fiction, Silence of the Lambs, Napoleon Dynamite, Star Wars I, IV, V, IV, but not anything else, and those I was late to, seeing them in the late 90s),

ETA: Oh, yeah, no Hunger Games or Jurassic World or anything of that. I don’t think I’ve seen any of the Jurassic series. All I remember about Alladin is that it’s a cartoon, right – Robin Williams? I didn’t realize it was that popular. I haven’t seen a Disney flick since I can’t even remember when (assuming it’s a Disney flick.) I have seen Trolls, though, thanks to my two daughters, but that’s not Disney. And I do want to see Ralphie Breaks the Internet and the new Incredibles movie, but we’ll see if I ever get around to it. My kids aren’t interested in going to the cinema yet.

Going from the top fifty of both lists, I haven’t seen:

American Graffiti
American Sniper

Beauty and the Beast & The Jungle Book - the live action ones
Cleopatra
The Dark Knight
& The Dark Knight Rises - actually, I haven’t seen any Batman movie
Doctor Zhivago
E.T.: The Extra-Terrestrial
Furious 7
The Graduate
Harry Potter and the Deathly Hallows Part 2
- and I haven’t read the books either
The Hunger Games & The Hunger Games: Catching Fire - wrong demographic for these
Jurassic World & Jurassic World: Fallen Kingdom - I wasn’t that impressed by Jurassic Park
The Last Jedi - I’ve finally given up on the Star Wars series and didn’t see this or Solo
Love Story
The Passion of the Christ
The Secret Life of Pets
Spider-Man & Spider-Man 2
Transformers: Revenge of the Fallen
& Transformers: Dark of the Moon

Looking at this list the only ones I want to watch would be Doctor Zhivago and The Passion of the Christ. And maybe The Graduate.

Depends on your definition of “everyone in the world,” but I’ve seen very few of the big-budget Oscarbait dramas from at least The English Patient on. I like Hollywood mainly for glossy action romps and the occasional semi-subversive comedy, but I often find mainstream dramas to be a snooze.

Also, I’ve never seen the third Star Wars prequel. I saw Phantom Menace when it opened and the second one years later on TV, but I don’t THINK I ever got around the third one.

In the last 20 years, I’ve seen many movies listed multiple times: I love Titanic, Harry Potter, Lord of the Rings, Jurassic Park, Star Wars, I’ve seen many of these at the theater and again on basic cable on dull weekend afternoons.

But here are some movies critically acclaimed, bestowed with awards, the cream of the crop that as far as I know, later sank like a rock: Moonlight. Spotlight. Birdman. The Artist. The King’s Speech. Crash. The Reader. Carol. (and Shakespeare in Love, and Chariots of Fire.) . I’ve heard of them, but I don’t know anyone who has actually sought them out and watched them.

The thing is, when I was young, going to the movies was often a weekly thing. Decades later, we here have gotten out of the habit of going to the theater, and the movies they’re making and showing now (Spidermans, Batmans, Avengers, on and on and on) sound so juvenile and unappealing I would rather stay home and do chores with Titanic on in the background, where I watch my favorite bits.

Haven’t seen Titanic, Harry Potter, Twilight, Hunger Games, Transformers, Toy Story, Dory/Nemo, or any of the Christmas movies except for National Lampoon’s Christmas Vacation.