I suppose by "desktop" you mean the PC configuration (i.e. not a laptop), and not the "desktop environment" (i.e. KDE or Gnome).
I do use Linux, and use FVWM as window manager, which is (fortunately) not properly a "desktop environment" (see this thread
http://www.fvwmforums.org/phpBB3/vie...072&hilit=NODE )

BTW under OpenSuse, mainly on desktop, occasionally on laptop. I have also a Windows virtual machine under VBox.

My desktop OS is Linux Mint -- love the look'n'feel and ability to customize.
(NOT desktop: Old Toshiba Laptop runs LXLE, also Linux, and my Nexus 5 phone is Android 6.0.1, built on Linux.)

Currently, I am using ubuntu 15.10. But wi-fi is not working.
I tried to fix wi-fi problem but couldn't succeed? But everything is OK except this problem.
How beautiful ubuntu 15.10 is!!!!!!!!!!! _________ NICE.

Desktop - Win 7 Pro and 10 Pro both 64bit

Laptop - Mint 17.3 (Mate) and Win 7 Pro both 64bit

I currently run Windows 8.1 and 10; CentOS7, and OpenSUSE 42.1 (Linux builds are on one laptop and on virtual machines).

HP Elite book 2170p with Debian Jessie 8

winxp, linux lite, lxle and slackware.

I use lite for normal desktop use,slackware for learning about linux, lxle for occasional inspiration and winxp for rarely used software.

winxp now seems to run like treacle but it's like lightning compared to win 8.1 on a friend's laptop.

I've got a few Linux systems that I use regularly. My main system runs Ubuntu MATE 15.04 only, awaiting upgrade to Ubuntu MATE 16.04 (aka I haven't gotten round to locating and migrating the customised configuration files yet). My laptop still has Linux Mint 17 MATE Edition on it, which was the first and main Linux system that I put on there, but also Ubuntu MATE 15.04 and the Windows 7 that came with it (the latter of which I use for the occasional Skype call). I also have an old desktop (early-2000s) with my first ever Linux system, Xubuntu 8.04, and a broken Windows XP system that came with it (the latter of which I don't use anymore as it is broken - doesn't boot half the time and when it does it usually gives a BSOD shortly afterwards). I also have a few random systems that I've set up for various projects, such as another old desktop with a Debian server installation on a spare hard drive and the system that I once had on my laptop to configure it as a router (to route traffic between another computer directly connected to the ethernet port and the wifi network, used when I needed an internet connection for another computer some distance away from the main router).

Bedrock Linux

Linux Ubuntu 16.04.

Windows 8.1 (laptop)
Mac OS X (laptop)
Fedora 22 (desktop)
Bodhi (Virtual Machine)

So lets start counting:

-Fedora 23 with Windows 10 Pro on kvm image for my workstation.

-Windows 10 Pro with hyper-v enabled and some Centos 6.5/7 , Fedora 23 and RHEL vm images on my wife's pc, which was mine but she claimed it as it has "bigger screen" to watch TV-series (and she still hasn't figure out why sometimes the pc is responding a little bit slowly :P ).

-Fedora 23 Server on a laptop which acts as NAS in my home

-Windows 8.1 Enterprise, on the laptop which is provided by the company I work, with hyper-v and a Fedora 23 vm on which I mostly do my daily working routines (through putty and VcXsrv, presenting the apps on my windows desktop) because I don't like cygwin.

-And numerous RHEL 5/6/6.5 and Windows 2008/2012 R2 servers on the supported clients...

As my "love" is equally both linux/*nix and microsoft environments, you can say that I am not the typical *nix admin (or I am not the typical ms admin, clearly I cannot distinguish myself as either of them the last decade.)

(Laptop) Windows 10 Pro
(Laptop) Windows 10, multiples Linux, multiple BSD, Solaris

I am currently running PCLinuxOS, on a USB drive, although I have also used variations of Ubuntu over the years.

Desktop systems: Windows 7 (6)
pdc: Windows server 2003 (1)
backup dc: Univention corporate server (linux) (1)
web & email server: Slackware linux 14.1 no xwindows (1)