Since I'm drawing all my inspiration from Mark at Kaedrin, here is my take on the Guardian's best 50 book to movie adaptations:
1. [BM] 1984
2. [BM] Alice in Wonderland
3. American Psycho
4. [M] Breakfast at Tiffany's
5. Brighton Rock
6. [BM] Catch 22
7. [BM] Charlie & the Chocolate Factory
8. [BM] A Clockwork Orange
9. Close Range (inc Brokeback Mountain)
10. [BM]The Day of the Triffids
11. [M] Devil in a Blue Dress
12. [M] Different Seasons (inc The Shawshank Redemption)
13. [BM] Do Androids Dream of Electric Sheep? (aka Bladerunner)
14. [BM] Doctor Zhivago
15. [B] Empire of the Sun
16. [M] The English Patient
17. Fight Club
18. [M] The French Lieutenant's Woman
19. [M] Get Shorty
20. [M] The Godfather
21. [BM] Goldfinger
22. [M] Goodfellas
23. [M] Heart of Darkness (aka Apocalypse Now)
24. [BM] The Hound of the Baskervilles
25. [BM] Jaws
26. [M] The Jungle Book
27. A Kestrel for a Knave (aka Kes)
28. [BM] LA Confidential
29. [M] Les Liaisons Dangereuses
30. [M] Lolita
31. [BM] Lord of the Flies
32. [M] The Maltese Falcon
33. [BM] Oliver Twist
34. [BM] One Flew Over the Cuckoo's Nest
35. Orlando
36. [B] The Outsiders
37. [BM] Pride and Prejudice
38. [M] The Prime of Miss Jean Brodie
39. The Railway Children
40. [M] Rebecca
41. [M] The Remains of the Day
42. [M] Schindler's Ark (aka Schindler's List)
43. Sin City --- does the Dark Knight count?
44. [M] The Spy Who Came in From the Cold
45. [M] The Talented Mr Ripley
46. [BM] Tess of the D'Urbervilles
47. Through a Glass Darkly
48. [BM] To Kill a Mockingbird
49. Trainspotting
50. [M] The Vanishing
51. [BM] Watership Down
Yes, they really did include 51. Please don't ask me why, I'm not a journalist.
Looking at the lists I can find via Mark, nobody has seen or read Brighton Rock or A Kestrel For a Knave. I do think there is a bit of a British bias to these choices as well.