give me your 3 all time

The Godfather Trilogy (1990). it's The Godfather I and II in chronological order with all the "Young Vito" scenes with Di Nero in Godfather II first, original Godfather with Marlon Brando in the middle and the "Michael as Godfather" with Al Pachino from Godfather II to finish. much like Coppola's, Apocalypse Now Redux there is a lot of added out takes from the originals that fill blanks in the story.

ref: https://en.wikipedia.org/wiki/The_Godfather_Saga

the original three Star Wars (1977-1980-1983). the three "prequels"  (1999 thru 2005) were OK too BUT the originals three are still my favs

my "gambling or sports trifecta" which I watch IF I need a good laugh of Slap Shot (1977), Let It Ride (1989) and California Split (1974)

Major League
Superbad
Snatch

I could easily list 100's

Movies I consider to be classics...

Cool Hand Luke

The Godfather

Butch Cassidy and the Sundance Kid

Yeah, I think you have to rule out comedies and anything in the last 20 years -- with one notable exception below -- when putting together a list like this.

Pre-1960: Treasure of Sierra Madre, Maltese Falcon, Shane

Post-1960, Clockwork Orange, 2001 Space Odyssey, Apocalypse Now 

Post 1990: Forest Gump

comedy...

1. christmas vacation

2. slapshot

3. hangover

Shawshank Redemption

Braveheart

Gladiator

The Patriot

Goodfellas

I had to go top five.  Frankly it was hard to narrow it down this much.  I didn't even get a chance to touch on any horror films since they are always fun but never great films (well almost never... Rosemary's Baby is great).  BOL!

i only watch movies with nicolas cage in them.

two of my favorites:

raising arizona

birdy

I might have to agree with that.