I'm bound to regret this as i'll forget loads! In no particular order:
Jaws
Psycho
King Kong (original)
The day the earth stood still (original)
2001: A Space Odssey
Some like it hot
Dirty Rotten Scoundrels
Halloween
Magnificent 7
Throne of blood
Great Escape
Bridge on the river Kwai
Pale Rider
Sergio Leone Western trilogy
Ride lonesome
It's a Wonderful Life
Cool Hand Luke
The Wizard of Oz
Planet of the apes (original)
Raiders of the lost Ark
Mark of Zorro (Power)
The Sea Hawk (Flynn)
Robin Hood (Flynn)
Gentleman Jim
Bladerunner
Superman the Movie
Tarzan the Ape Man (Weissmuller)
M fritz Lang
The black cat (Lugosi)
Gone in 60 seconds, I know!
Coraline
The Right Stuff
I think other films will get there, Tombstone, Gran Torino but they haven't been out long enough to catch up with the others yet!
I didn't list any Duke films as that's a given, as I'm on this forum, that they get watched regularly!;-)