My 4 host machines run debian (proxmox). I have a lot of different guest flavors running though, debian, fedora, rocky, one old guest still running Ubuntu and even a mint sandbox machine.
I probably have a bit more complicated self host than others because I am using it both for my useful internal services (jellyfin, git, pihole, etc.) I also run a whole lot of services for learning, such as kubernetes and dns. Plus a whole lot of other mostly useless stuff that I only use to test different architectures or automations that come in handy as an SRE.
It’s not innovative anymore, but it sure was when it released. But they kept it near its peak instead of making it utter horse crap.