Honestly one of the coolest sites I've seen in a while, but if I hadn't read the comments, I would have left the site right away- there's no hook to get a user to stay there!
But the design and effects/transitions are crazy awesome and they're pulled off perfectly. I really like how it gets you to think about who you want to be first- so then you can choose habits that will help you get there. To be honest though, I'm currently using an app Lift that I found a few days ago. If you made a mobile version of this, I would switch in a heartbeat, however!