OK, but not in any particular order. That changes with my mood.
1. LOTR, ROTK
2. LOTR, TT
3. LOTR, FOTR
4. Age of Innocence
5. Casablanca
6. Rudy
7. The Adventures of Robin Hood
8. Rebecca
9. Singing in the Rain
10. The Empire Strikes Back
sorry, can't do just 10
11. Billy Elliott
12. King Kong (1933)
13. The Last of the Mohicans
14. Much Ado About Nothing
15. Raiders of the Lost Ark
16. The Searchers
17. To Kill a Mockingbird
18. Tarzan and His Mate
19. The Wizard of Oz
20. When Worlds Collide
These are just the ones that I thought of off the top of my head. I love so many movies that tomorrow, many of these could be replaced by some I love equally, like Star Wars, The Usual Suspects, White Christmas, The Big Country, The Day the Earth Stood Still, Spartacus...I could go on and on. So I'll stop. Under protest.