The sum-total of my personal infrastructure is self-hosted in my cgit repository. A bunch of Ansible roles that do cool things and are being constantly iterated to make my infrastructure and the infrastructure of Kickass Systems super flexible and resilient.
I'm extra proud of a sort of philosophy that has began to imbue these roles that I've written. I'm not quite at the point where I can perfectly vocalize them, but as I work with these, particularly my home directory setup role, I am quite pleased with the system that I've created for managing these boxes. The idea that nearly everything can be managed as a simple configuration, even your laptop or phone, is incredibly powerful. It isn't difficult to create a system of stateless virtual machines that can be thrown away and rebuilt with the right set of tools, and I think that's a great way to go about building servers.