This album was bought for me a while back - it was my birthday or something and I quite like The White Stripes. Even though The White Stripes don't play a single track on the album, it features the songs they've covered and which have helped shape their own music: "The country, folk and blues compendium that inspired them."
My favourite though, by a long chalk, is Son House singing what I guess is a piece of Gospel Blues: John the Revelator. The only instrument is his voice. Powerful.