I don't know why, but I've always gotten a kick out of reverse engineering data files for computer games. Although decompiling a game's code is a challenging task, data files are often much easier to figure out (as they contain lots of highly visible content like text and sprites) and let you mod the game if you're able to figure it out sufficiently.
more here.........http://www.zachtronics.com/yoda-stories/
more here.........http://www.zachtronics.com/yoda-stories/