Ok, so I'm bumping this thread back up because it's been about two years since it was last revisited, and it would be cool to see if opinions remain the same or have changed since then, especially considering the current era of the studio.
Here is my personal list as it currently looks:
Do you agree with it? Which era or period is your favorite, and why? My personal film favorites from each period are marked with a

My best favorites are marked with a
A) The Golden Age (1937-1942)
This period reflects Walt’s beginnings in the animated feature film genre, and the studio’s most creative and ambitious time. The films in this period boast a level of meticulous detailing unseen before or since then.
1. Snow White and the Seven Dwarfs (1937)
2. Pinocchio (1940)
3. Fantasia (1940)
4. Dumbo (1941)
5. Bambi (1942)
B) The War-Package Years (1943-1949)
This period started when the war took a heavy toll on the studio by not only drafting many of the employees and animators, but by also cutting off the European market for the films, and by having the studio do films to support the war effort. In order to cut costs and still cover the demand for the animated features, Walt decided to combine multiple short films to create full features. However, even though the war ended in 1945, the film style continued until 1949.
6. Saludos Amigos (1943)
7. The Three Caballeros (1945)

8. Make Mine Music (1946)
9. Fun and Fancy Free (1947)

10. Melody Time (1948)
11. The Adventures of Ichabod and Mr. Toad (1949)
C) The Silver Age (1950-1967)
This period marks the return of the studio to single-narrative films. They also show a marked increase in the quality of the music and songs used for the films. The films from this period are among the most cherished by fans and are seen as classic Disney. This period ended soon after Walt’s death. It includes all the films in which Walt was directly involved.
12. Cinderella (1950)

13. Alice in Wonderland (1951)
14. Peter Pan (1953)

15. Lady and the Tramp (1955)

16. Sleeping Beauty (1959)

17. 101 Dalmatians (1961)

18. The Sword in the Stone (1963)
19. The Jungle Book (1967)
D) The Dark Age (1968-1988)
This period is called as such because it reflects the lack of Walt’s guidance at the studio. It was a time when the original animators (the 9 old men) began passing the baton – or the pencil – to a new generation of animators. This period was a time of trial and error, hits and misses, and experimentation into new mediums such as CGI (which was in its infancy) as well as different styles of storytelling.
20. The Aristocats (1970)
21. Robin Hood (1973)
22. The Many Adventures of Winnie the Pooh (1977)

23. The Rescuers (1977)

24. The Fox and the Hound (1981)

25. The Black Cauldron (1985)

26. The Great Mouse Detective (1986)
27. Oliver and Company (1988)
E) The Renaissance (1989-1999)
This period marks the return of Disney in full force. It is noted for outstanding stories and broadway-style music and storytelling. The films in this period revived interest in Disney, and it can be argued that it was the most successful period for the studio yet.
28. The Little Mermaid (1989)

29. The Rescuers Down Under (1990)
30. Beauty and the Beast (1991)

31. Aladdin (1992)

32. The Lion King (1994)

33. Pocahontas (1995)
34. The Hunchback of Notre Dame (1996)

35. Hercules (1997)
36. Mulan (1998)

37. Tarzan (1999)

38. Fantasia 2000 (1999)
F) The Depression (2000-2008)
In the same way that the roaring 20’s gave way to the Great Depression, such was the case with Disney. Whether it was overconfidence, lack of new ideas, experimentation… whatever the cause the result was the same. This period is notable in that it reflects the studio’s shift of direction, and the blunt experimentation of new styles and ideas. Due to this, most films in this period (with a few exceptions) performed very poorly, nearly destroying the studio and also almost bringing the end of traditional hand-drawn animation at Disney.
39. Dinosaur (2000)
40. The Emperor’s New Groove (2000)
41. Atlantis: The Lost Empire (2001)

42. Lilo and Stitch (2002)

43. Treasure Planet (2002)
44. Brother Bear (2003)

45. Home on the Range (2004)
46. Chicken Little (2005)
47. Meet the Robinsons (2007)

48. Bolt (2008)
G) The Resurgence (2009-Ongoing)
This is the current period at the studio. After the pronounced failures of the previous period, the studio finally realizes that it needs to go back to its roots, and so it goes back to the musical fairytale with the first film of the period, thus successfully restoring interest in Disney. This period combines many elements of past periods (such as the storytelling and music from the renaissance) as well as some of the styles and techniques from the depression (such as comedy and CGI). It is noted for a marked and substantial improvement in the quality of the films. However, experimentation still remains strong at the studio and it is yet to be seen what the outcome of the period will be. The good thing is that the films slated for release in the near future look very promising, and there's a very good possibility that they will not disappoint, notably Zootopia and Moana.
49. The Princess and the Frog (2009)

50. Tangled (2010)

51. Winnie The Pooh (2011)

52. Wreck-It Ralph (2012)
53. Frozen (2013)

54. Big Hero 6 (2014)

55. Zootopia (2016)
(Upcoming)
56. Moana (2016)
57. Gigantic (2018)
58: Frozen 2 (TBA)
59. Wreck-it-Ralph 2 (TBA)
60. Big Hero 7 (TBA)