Steve, simply because dawn/early part of the day is the best part of the day for me. It is often bright and clear skies. Some are early risers and early to bed , some the opposite.  But I find most TV boring (esp like your film review, many of the best are in a foreign language) so would rather go to bed early and read a book.. Best, Paul
PS I slept-in by 1.5 hours today..only because the Cockerill did so too..messed up my body-clock.  Don't get chickens! (unless to cook)