Pop_OS! on my home laptop (no desktop at home). My kids have gaming computers that run Windows and my wife just uses a ChromeBook to work from home or play her clicker games.
I have two Lenovo ThinkPads I use for my home office, which both run Ubuntu MATE 18.04. I also have a refurbished Dell Optiplex running Windows 10, although I sometimes use an Ubuntu MATE VM on it to get work done.
I use macOS Mojave 10.14.2 on my MacBook Pro that I use for work. I also use a virtual Windows 10 Pro with Parallels Desktop on it.
At home I have a Windows 10 PC for gaming and heavier workloads.
On my Dell R710 I use an evaluation copy of Windows Server 2016 with Hyper-V but I guess I will switch to XCP-NG. There are several vitual machines mostly running Linux on it.
Every system except 1 laptop running Win 7 runs Linux or FreeNAS and one pfSense. Servers on VMware. Linux has served me well since '97 and have used many distros. The current distros in use Linux Mint desk top and laptops, Peach Netbook Edition on an Acer netbook servers Ubuntu & 1 Centos. I also like Elementary and Qubes OS but not in use. TAILS and TENS on thumb drives.