Think nothing much changes with you from day to day? Check out what J-K Keller did to document his apparent lack of change.
Your face changes, based on stresses, weather, daily activity (or lack thereof), emotions, attitude ... nevermind what you can do to you hair. I've seen similar projects done by taking monthly or yearly shots of people, but nothing that shows daily changes. what a great regimen.
The web is a perfect showcase for amazingly dedicated projects like this.