I'm a night owl anyway, so I maintain my NOC schedule all the time, unless I'm off for an extended period of time or have to be up during the day for something. Switching to a day schedule is really hard on me, and I end up, like you, feeling like I'm sleeping all the time, day and night. Some of my younger coworkers can flip flop back and forth, but it's easy enough for me to just structure my life to a night-time schedule.
That being said, supposedly anchoring sleep is very useful for shift workers in making sure they're getting enough quality sleep. You can google it, but basically, it's where you make sure that you're sleeping at the same 3-4 hour time period every day, regardless of whether you're working. So, for example, maybe you sleep from 0800-11000 every day, even on your days off. so your work days could look like sleeping 0800-1600, and your days off look like sleeping 0100-1100.
I don't know, I require a lot of sleep regardless of night or day sleeping. Give me 9 hours at least, please.