Ask HN: What is your Personal/private server setup?

There seems to be a trend to personal/private clouds, especially with YC comapnies like Protonet. VPS are nice, but are fully accessible by the owners of the server and offer little in way of physical protection.

I've been doing research into server setups, especially with boards that are libreboot compatible but many are above my needs or too costly. Moreover, component and energy cost are factors to consider for personal users more than for businesses, and yet don't seem to be very talked about.

What are you personal server setups? Do you use a special OS, BIOS etc?