I’m using Fedora GNOME for my pcie passthrough desktop vm and Debian Bookworm for my hypervisor and virtual servers.
When Bookworm ages I’m sure I’ll mix in other distros for vm servers to try out stuff that isn’t available in Debian Stable yet.
I’m also curious to set up a virtual NixOS and a virtual Fedora Silverblue/Atomic just to check them out.