hmmm now this is really tough but I would say:
Pan’s Labyrinth, Roman Holiday, Casablanca, Trainspotting, American History X, The Grand Budapest Hotel, Le Fableux Destin d’Amèlie Poulin, Blue Velvet, The English Patient, To Kill a Mockingbird, Alphaville, Les 400 Coups, Micmacs, The Big Sleep, La Dolce Vita, The Talented Mr Ripley, Goodfellas, The Godfather Trilogy, La Vie En Rose, Atonement, Bladerunner, any/everything directed by Satyajit Ray (to whom Wes Anderson pays tribute in The Darjeeling Limited), Never Let Me Go, Rashamon, The Darjeeling Limited for that matter, The Royal Tenenbaums, Rushmore, Spellbound, Vertigo, Le Mépris, Alien, La Verité, anything with Marlene Dietrich in it (because everyone needs to have seen Marlene Dietrich in something), A Bout de Souffle, Se7en…
I will leave it here, although I’ve definitely forgotten some important ones, and I might add some more to this list if I think of them. This doesn’t coincide exactly with my absolute favourite films, by the way - these are all favourites, but these are the ones I think go beyond personal value and which anyone could get something out of. I am sad at the lack of diversity here, though - sadly I haven’t had a great deal of access to non-European/American films. I’ve been meaning to watch more Middle Eastern and Indian cinema but I don’t really know where to begin, nor do I have a great deal of access to these films, which frustrates me. Another note - I was a little hesitant at the inclusion of American History X because it is a very confronting film and I’m not sure what the discourse about it is, all I can say is that I found it very challenging and eye-opening, though I’ve only ever seen it once.
I hope you get something from this list! xx