Amazing. Ive been doing that for a while (just in my head or on paper) and it makes the mornings so much easier, especially when I'm on call and have 2 days to prep on one morning. I rarely change my mind unless weather or plans do something very unexpected. (Or today, when the plaid shirt I planned to wear was IN THE LAUNDRY, so I guess I would benefit from the hanger version).
What amazes me is how much each one of these outfits looks just like you, even just hanging on the hanger. You have your style nailed perfectly!