King of Kong, A Fistful of Quarters: About a guy trying to break the world record for Donkey Kong.

I'm sure that one was interesting

A few recommendations:

The Corporation
Enron: The Smartest Guys in the Room
Bush's War
Ghosts of Rwanda
Radio Bikini
Trinity: The Atomic Bomb Movie (listen to the commentary, it's phenomenal)
War of the Century (BBC Production about Operation Barbarossa)
King Corn

And of course, Hoop Dreams

Dogtown and Z-Boys

The Decline of Western Civilization Part II: The Metal Years.

Its worth it just for the Chris Holmes shoot and watching Ozzy cook breakfast.

Ken Burns' baseball documentary is amazing and his brother's documentary on New York is great, too.

Man on Wire just came out this year. Really good movie.

I also love Winged Migration and Buena Vista Social Club.

Does Koyaanisqatsi count?

Oh god yes.

I own the New York documentary. It's very good. Tons of interesting stuff in there.

I was disappointed that I couldn't find this on netflix.

BTW, I second DiG and Fistful of Quarters.

Winged migration is awesome film work. The footage is amazing.

American Hardcore - Inspired by Steven Blush's book "American Hardcore: A tribal history" Paul Rachman's feature documentary debut is a chronicle of the underground hardcore punk years from 1979 to 1986. Interviews and rare live footage from artists such as Black Flag, Bad Brains, Minor Threat, SS Decontrol and the Dead Kennedys.

great documentary right there. i think i watched it on videos.google.com.

I'd like to see that. I listen to Minor Threat quite a bit. I have a Minor Threat station programmed on pandora.com.

you must be GUILTY OF BEING WHITE!!!!

Brother's Keeper - Rural farmer brothers living in poverty on the family farm, sleep in the same bed, one morning one brother wakes up and the other doesn't, trial for murder ensues
Capturing the Friedmans - a Long Island [I think] family, where the father teaches computers in the basement to kids and is accused of molestation, you'll never come to a satisfying conclusion on the facts at issue.
Murder on a Sunday Morning - one of the most compelling cross-examinations ever caught on tape. black kid corralled on a sketchy description and bullied into a confession. The cross-examination lays out all the abuses the interrogator employed through his own uncomfortable admissions.
Ghengis Blues - former blues singer learns he has a talent for Tuvan throat singing, a fascinating way of playing multiple tones and rhythms simultaneously through throat control. If nothing else, d/l some throat singing and give it a listen.
Gimme Shelter - the Rolling Stones concert where one of the Hells Angels hired for security stabbed a concertgoer to death.
March of the Penguins
Gray Gardens
Salesman

and set apart as the masterpiece it is;
Planet Earth


not really a 'documentary' but An Evening with Kevin Smith