Ah yes... Films! my favorite of past times! Well let break this shit down into categories, this list is going to be semi comprehensive, basically throwing enough shit at the wall and hope someone like some of it. Ill admit most of my choices will have been made in the last 30 years. Im not an old film buff, but there may be one or two on there.
Ill also warn you a lot of my choices are relatively mainstream so dont expect any hidden gems but if you havnt seen any of these i do heartily recommend them.
-Classics (films i think everyone should see at least once)
-Dumb fun (movies that arent fantastic but not bad either, just a lot of fun to watch,)
-Movies that make you think
-Movies you can rewatch endlessly
-Movies you get drunk and watch with your bros because that shits hilarious yo.
-Just solid movies (just good solid films, they wont disappoint just maybe not up to the classics level)
Classics
-Forrest Gump
-Black Hawk Down
-Lord of the Rings Trilogy
-OT Star Wars
-Pulp Fiction
-Shawshank Redemption
-Godfather
-Goodfellas
-Terminator 2
-Matrix (Only the first one)
-Dark Knight
-Apollo 13
-Hot Fuzz (yeah its going on the classics list for me)
Dumb Fun
-Pacific Rim
-Independence Day
-Any of the Fast and Furious movies
-Bad Boys II
-21/22 Jump Street
-Airplane
-The first Transformers and Bumblebee
-The new Star Trek Films
-Ready Player One
-Zombieland
-Goon
Movies that make you think
-Inception
-Interstellar
-Watchmen
-Crimson Tide
-Equilibrium
-Ex Machina
-V for Vendetta
-The Prestige
-Fight Club
-American History X
-Arrival
Movies you can rewatch endlessly
-Dodgeball
-Shaun of the Dead
-Mad Max Fury Road
-How to Train your Dragon (Any of them)
-Honestly most of the MCU
-Jurassic Park
-Princess Bride
-Armageddon
Movies you get drunk and watch with your bros because that shits way better with company and booze.
-Star Ship Troopers
-Batman and Robin
-Naked Gun
-SuperTroopers
-Spaceballs
-Anchorman
-Tropic Thunder
-Monty Python and the Holy Grail
-Boondock Saints
-Top Gun
-Blazing Saddles
Just solid movies
-End of Watch
-Hunt for Red October
-Django Unchained
-Remember the Titans
-Enemy at the Gates
-Jarhead
-The Man from UNCLE
Ok Fine, some Hidden Gems
-Fanboys (a group of estranged friends who break into skywalker ranch to see Ep1 before their friend dies of cancer)
-The Wolfs Call (French Submarine movie, it was not award winning stuff but it had a neat premise and good visuals)
-Warrior (MMA movie about two estranged brothers trying to fight their way out of individual hardships)
-Moon (Ok not that hidden, but excellent film about a man nearing the end of his service on the moon)
-Death of Stalin (Ninjad)
-Seven Psychopaths (Alcoholic Screen writer gets caught up with some nefarious characters, great fucking watch)
Best Christmas Movie
-Die Hard
Sorry this got a bit more intense than I thought, ill probably add a few more as I remember them. None of these are rarities but I think its a good list of good movies that most people would enjoy =) cheers!