Yeah, sleep is an interesting one to consider, I initially left it out of the top 5 because I thought is was a harder thing to actively control, at least for everyone. For instance, you could go to bed at you're desired time and still have a bad sleep. I'll consider the "sleep" option more... in the meantime feel free to customize your interpretation of these questions to include it in your overall 5 point score. Hopefully we'll eventually have an app that can go into more detail if desired.
Thanks for the suggestion!