what is your favorite/ favorites classic album documentary?
Pink Floyd - Dark Side of the Moon
Nirvana - Nevermind
"The only thing that Columbus discovered was that he was lost"
If you are referring to "Classic Albums" series, my favorites are Steely Dan, Jimi Hnedrix, Nirvana and Stevie Wonder. I prefer more focus on the technical aspects of the recording, some of them deal more with the drama of the band or other details I find less interesting.
The Cure - 'Disintegration'
Pink Floyd - 'The Darkside of The Moon'
REM - 'Automatic For The People'
Radiohead - 'OK Computer'
Classic is relative, so I approach as such! 
"And the angels wouldn't help you.. Because they've all gone away.."
- Laura Palmer, 'Twin Peaks: Fire Walk With Me'
U2 - the joshua tree
Judas Priest - British Steel
"The only thing that Columbus discovered was that he was lost"
the who : who's next
hey, just gonna slap it here, end of the century: the story of the ramones, love this movie documentary!!!