Nights never bothered me... I can drink a pot of coffee at 530am when I get off and go home and sleep like a baby. I like nights as all of you know less BS calls, less traffic, no brass giving you or your guys dumb stuff to do.
When I was off, I'd go right back to sleeping at night... granted I went to bed later like 11pm or midnight. On some occasions I'd not fall asleep right away. Guys at work are like "how can you do that" and I'm like "I don't know... I just go to bed".
My routine was go to bed as soon as I got off... wake up about 11am let the dogs out, go back to bed until about 2pm where I'd get up and go do my daily run or go to the agency gym. Finish working out by 3:30-4:00, cool down relax, shower and dress to be ready for work by 5:00/5:15.
I'd eat something healthy and light around 6:30 and eat a good meal around 3am. Rarely did I snack or eat just before getting off work.
Our bedroom was blacked out, A/C usually down a little low, main phone turned off, and a white noise making machine made for a good sleeping environment. When the kids were young and home on weekends, they generally were careful about making excessive noise. When we built our house we added an extra barrier to our outbound bedroom wall to help keep outside noise down. My closest neighbors other than my in-laws are several hundred yards away and they are grown with no kids or barking dogs... that helps.
I have an Admin job now since I got promoted to Lt. and miss the ease of keeping a healthy routine that nights provided.