I'll give you a top 15, in no order. Pulp Fiction Inglorious Basterds Star Wars Episode V: The Empire Strikes Back The Dark Knight Alien The Godfather Part II Die Hard The Breakfast Club Apocalypse Now Monty Python and The Holy Grail Guardians of the Galaxy Trainspotting Back To The Future Raiders of the Lost Ark Blade Runner Please don't ask me to dum it down.
The Third Man, my all time favourite. Doctor Zhivago Billy Liar Spinal Tap Guns At Batasi Enemy At The Gate.
Not sure where, but Grand Hotel Budapest has probably entered my Top 50 since I saw it a few days ago.