What is your base system in your home server?

I have my two main servers with AlmaLinux. one is just for me and my personal data, the other is my media server for the seven seas, and apps for my friends to access. I also have a few Raspberry PIs with DietPi as servers for things like my WireGuard server, backup AdGuard Home instance, PeaNut for UPS monitoring, and PiKVM