1. Aokigahara: Suicide Forest
2. How to Mend a Broken Heart
3. How Much is Your Dead Body Worth?
4. I Am Alive
5. The Dark Side of Porn: The Real Animal Farm
6. Real Life Hannibal Lecters
7. ZOO
8. Pornography: The Secret History of Civilisation
9. Louis Theroux- Extreme Love: Dementia
10. Graphic Sexual Horror
11. Saving Face
12. Mental: A History of the Madhouse
13. National Geographic: Moment of Death
14. Elephant Man Autopsy
15. SICK: The Life and Death of Bob Flanagan
16. Blood & Guts: A History of Surgery
17. National Geographic: Secrets of the Body Farm
18. My Flesh and Blood
19. Terry Pratchett: Choosing to Die
20. Bulgaria’s Abandoned Children

In no particular order, though, but these are some of my favourite documentaries, for various reasons.

I should mention that most (if not all) of these documentaries call for viewer discretion, as some do deal with topics/imagery that can be disturbing/offensive to some people.