I imagine that's extremely inconvenient for you to have your sleep schedule revolve around work.. I commend you on that. I'd be so grumpy & grouchy in that situation..Both. It's complicated.
My sleep schedule is entirely dependent on my work schedule, and my work schedule is inconsistent because I'm in assistant management and have to have open availability to maintain adherence to the bar of standard. The exception to that of course is that if I get another job, provided it doesn't conflict with my hours at my current job, my boss will be willing to give me a fixed, block schedule. But otherwise, someone calls out, I've gotta make calls, if there's a technical problem, I've gotta go up there, if there's a security issue, I've gotta go up there. etc.
But on a personal level, I'm a night person.
I always have been. It's more peaceful at night, it's quieter, I can think clearer and do my leisurely stuff better at night.
So my days are about me being a responsible adult, and my nights are about me subjectively as a creative mind trying to reflect on the day, decompress and relax.
I really only sleep for about 5 hours a night.
Unless it's oddball weeks with schedules, or some dumb thing/s that jam up some of my time for being responsible during the day, then I just don't sleep at all, and sleep when I get home from work.
I usually get 6/7 hours a night if I'm lucky.. sometimes I just have too much on my mind to wind down. the 4 hour sleep days are the worst though.