We did the exact same thing about two years ago and save over $1200 annually (after taxes)! I, too, love documentaries and Netflix is the king of that genre. They're not always listed in the suggested titles so you have to look for them.
Here are some of my favorites in no particular order. (that's not true, they're in the order that I remember them):
- Jiro Loves Sushi
- Exit Through the Gift Shop
- Somm
- Tiny
- The Art of the Steal (haven't watched yet but is on my list)
- Mind of a Chef (can't wait for season 3)
- Ai WeiWei: Never Sorry
- The Queen of Versailles
- Encounters at the End of the World
- Manakamana (haven't watched yet but is on my list)
- Virunga
- Radio Bikini
- Pandora's Promise (haven't watched yet but is on my list)
- Fat, Sick, and Nearly Dead
- A Year in Burgundy
- Food, INC.
- Three Stars
- Bottle Shock (not a documentary but a great telling of the US winning a prestigious wine event in France)
- Hey Bartender
- Objectified (it's about industrial design)
- Helvetica (I'm a typography nerd, so this was awesome to me)
- Design is One
- Going for Gold: The Bocuse d'Or
- Inside Lego
- After Porn
- Red Obsession
- This Film is Not Yet Rated (about the MPAA)
Also, if you like food documentaries, make sure you add the Chow Channel (free) and watch their series "Obsessives"