I just started listening to the Roots latest album, "Undun", and it's becoming increasingly fascinating. It's a concept album telling the bleak tale of a criminal's life, starting with his death and working backwards in time. In an age when the common wisdom seems to be that people don't listen to albums anymore, it's great to see works like these being made. ?uestlove had an article on Pitchfork writing about his favorite concept albums. I'll have to give another listen to Stevie Wonder's "Journey Through the Secret Life of Plants."
Some of my favorite concept albums: The Flaming Lips - "The Soft Bulletin", Pink Floyd - "Animals", Kate Bush - "Hounds of Love", Tool - "Aenima", David Bowie - "The Rise and Fall of Ziggy Stardust".