Home server: Intel S3420GP, Xeon X3470 / 16GB RAM / 6x 4TB HDDs in RAID 6 -- OS: ClearOS 7.2
Primary desktop: Dell Optiplex 990: i7-2500 / 32GB RAM / 3 monitors -- OS: Windows 7 Ultimate
Laptop: Lenovo G560 -- OS: Debian 10
Office PC: Intel DP55WB, i3-550 / 16GB RAM -- OS: Debian 8
I've become rather fond of Linux, but I have several apps that are really only practical on Windows, they are installed in a virtual machine running on the server which I can remote-desktop to over the internet. I also have VirtualBox installed on both the laptop and my office PC.