These are my personal picks:
Most intense documentary:
Vice Guide to Liberia
Vice documentaries are some of the best journalism being done today. This one is the best of the best.
http://www.vice.com/the-vice-guide-t...e-to-liberia-1
Most entertaining documentary:
Louis Theroux [Gangsta Rap, Vegas gambling]
Love Louis' stuff. I can't pick between his Rap episode and the Vegas one, they are both my favorites.
Most profound documentary:
Gates of Heaven [1981]
This might be the most profound film I have ever seen. It left me thinking about it for days afterward. I'm not even going to attempt to summarize. Here is a link to Ebert's review, where I heard of it.
http://www.rogerebert.com/reviews/gr...of-heaven-1978
Also,
The Story of Anvil, about the rock band, was ****ing amazing.
http://www.imdb.com/title/tt1157605/?ref_=fn_al_tt_4