The Invention of Dr. NakaMats, though, is my favorite so far. There's a preview on YouTube. Dr. Nakamats is the inventor of the floppy disk among many, many other things. He holds over 3,000 patents, thousands more than Thomas Edison who had a over 1,000.
It's awesome that he invented so many things, but that's not what's so interesting about him--it's his personality. He's unintentionally hilarious, and has a great sense of humor when he's trying to be funny. He only eats one meal a day, and his latest invention (as of the filming) is a bra for small breasted women. What a character. Do yourself a favor, get a free Hulu account and watch this documentary.