> Having some Sun during this time is nice for most people.

Is there a study that actually proves this? That people prefer daylight in the mornings when they're an early riser? I don't think they're as correlated as you and the other person are making it seem to be.

I think it’s the difference between high energy and low every people. Hugh energy people want to start the day actively and early. Low every and low-t people are looking for comfort and relaxation later in the day.