Unfortunately, the results weren't quite as interesting this time around. However, it is interesting to note that proportionally, Princess Celestia (out of the 12 main characters) has the smallest number of Safe images and the greatest number of Explicit images.

1. Comparing the Safe:Suggestive:Questionable:Explicit ratio in normal ponies, anthros and humans >>730750

2. Comparing the Safe:Suggestive:Questionable:Explicit ratio for different characters >>731154

3. Comparing the times a character is involved in an image tagged "Lesbian" or "Straight" >>731166

4. Comparing the times certain characters are tagged for breasts >>731214

5. Futanari (General) >>740752

6. Futanari (Comparing proportional frequency of depiction by character)
Without Maud Pie >>740958
With >>742839

7. Fetishes on Derpibooru >>748336

8. (Part 1) The 30 most prolific artists on Derpibooru by image ratings >>913513
(Part 2) The 30 most prolific artists on Derpibooru by image scores >>913544