The challenge that film photography poses is still fun to this day, albeit in a different form -- taking your oh-so-convenient digital camera and limiting yourself as you would if you had a single roll of film, and no way to check your work. It's 36 exposures or less, at a fixed ISO, and making these images as manually as you possibly can. Through the pain of restriction, the intent is that you'll spend more time thinking about what you're about to shoot, rather than firing your camera from the hip and hoping something comes of it.