I do drink black coffee, don't smoke, don't eat drive thru fast food in the cars. No chips, and all that pop garbage. I normally pack a sandwich type thing and tend to limit my time to about 6 1/2 hrs if I can help it and rarely sit down for a snack, take a 10 minute break in that day.
Had a guy would have hired me in an ideal job but he was about ripping out at 7am and dint like the idea I wanted to roll in at 10 on most days. I said,,, when I start late I am ready to hit it running, have had all the coffee, had a relaxed ****, got lunch snack, chores done at home andam well rested and really hitting a stride when others are getting tired at the end of the day and don't mind working over. I can go early when I got to but I just as soon let everyone fumble around for a while and get a bead where they need help and I get a good idea where and what I want to do by the end of the day where I am not watching a clock and outright forget what time it is.
I understand a lot cant work like that, I do like your schedule, 9 is good. I had a guy working for me,, asked after a week if I minded starting an hour later and said,, not at all. really worked well.