Once Upon A Time In The West and The Good, The Bad And The Ugly. For an Italian dude, Sergio Leone understood the American western quite well.
Stalker. A tragically forgotten film, but one I cannot take my eyes off of. Tarkovsky had one of the great director's eyes ever seen.
The Lord of the Rings trilogy, uncut. What the fuck. Have to have fun films, too.
Schindler's List. Oppressively beautifully shot.
Field of Dreams. James Earl Jones is enough to want me watch the movie over and over. Of course, the last line "Hey...dad. Want to have a catch?" breaks me down every time.
Monty Python's In Search of the Holy Grail and Life of Brian. Comedic masterpieces that never seem to get tired. "I have a fwiend in Wome, you know..."
Contact. Yeah, I know. A lot of people did not like it. I loved it. I got why the alien had to be dad. And anything penned by Carl Sagan is gold for me.
2001/2010. These are two very different movies, but there are very much the same to me. A well-done continuous story.
The Godfather I, II and III. Again, a continuous story for me. The third would have been so much better without Sofia Coppola (a better director than actress. If only Winona Ryder had not gotten ill) and Andy Garcia.
There are others. Buster Keaton's The General, Seven Samurai, Six String Samurai, Run Lola Run, City of Lost Children, Citizen Kane, The Wild Bunch, Goodfellas, Close Encounters of the Third Kind, Alien, Aliens and many more I will probably remember later. But, those are the ones which stick out right now.