For my main desktop I use Mint because it just works, widely supported and Cinnamon is good (sadly no Wayland yet. ;_;). I also use Home-manager for my configuration because it allows me to easily just specify my config as a set of files I can check into git.
For my server, I use NixOS, because having all my configuration in a few text files is very nice to get an overview of what my server is doing.
Fun nature fact: Their horns act like lighting rods to provide a safe path to ground so as to keep the electricity away from their internal wiring and plumbing.