Fedora the primary OS on my desktop, Debian the sole OS on my primary laptop.

OpenSUSE Tumbleweed on my desktop and my laptop.

At home I run Ubuntu on my main desktop. (I have yet to upgrade to 16.04, however.) At my office, my desktop is Fedora 22 and a 9 year old Lenovo laptop runs Xubuntu with quite a lot of snap. I also have a Macbook Pro, but I wish it ran Linux. (I know it can, but I have not gotten around to making the switch.)

I have been a Mac user since 1985 and still am. However, my professional life has evolved from supporting Mac networks, to mixed networks, to Solaris servers, and finally to Ubuntu servers. I've always had a primary Mac desktop both at work and at home, even at a time when I was managing Novell and Windows NT servers. My Mac at work typically has 20-30 terminal windows open to about a dozen servers. We have a System-76 Ubuntu desktop in the server room that serves as an IPMI console on the private network where the IPMI connections live. I use a remote screen to that from my Mac which lives on all the networks.

Debian for one workstation and two laptops.
Win 10 for another workstation for my wife and the couple things I can't run on Debian. Come on Garmin - make a Linux option.

All of mine dual boot Win 7 and a Linux distro...

Linux
 

Centos 6.7

My Primary OS
 

Hi Jeremy
I almost exclusively use Linux -Kubuntu as my working system.
I have WindowsXP! on another partition (but with no internet connection) last used ages ago .
On another partition I use Debian-7 -minimum install - used only to backup my working partitions (root & home) -with fsarchiver

I run Linux Mint 17 and that is my primary OS. I have a virtualized Windows 7 install that I use when necessary.

UBUNTU 16.04 on desktop and netbook. The desktop dual boots to Windows Vista (defaulting to Linux), but I only use windows when I really have to, like accessing Samsung Kies.

Linux 3.16.7-35-desktop
openSUSE 13.2 (Harlequin) (x86_64)

"Just as soon as" I have the time I'll jump to 42.
--ml

PCLinuxOS is my primary desktop on my main two machines. One is dual boot with XP, the other also can boot to Win7. I also have one machine with an older version of Ubuntu and several other older machines with earlier versions of PCLINUXOS (just too lazy to update them).

PC Linux OS is my main OS since 2007.

Hi

(desktop) Fedora Gnome is my primary operating system.

Multiple operating systems on removable drives for testing purposes:

1)Debian Testing Gnome & Arch Linux Gnome & Trisquel GNU/Linux 7

2)(desktop) Deepin 15.2 & ROSA Desktop Fresh KDE R7 & KaOS Linux

3)(desktop) openSUSE Leap 42.1 Gnome & Sabayon Gnome

Ubuntu is slowly turning into the main computer due to the fact that it has the highest screen size [medium hi-def]. And my trading broker and charting software us it all [need & am getting a 4k monitor soon !

Also Magic Jack [volp] does not support XP any more [if it supported Linux , i would renew it ]

And then there is my hot mail [ MSFT is still fn it up ] and it does not run all the time on my Ubuntu

so i need a new Linux friendly VOLP and a new email

MY Tradingview.com runs great on Linux ! [stock charting ]
Option House & Scottrade run fine in Linux ! [ stock & option brokers ]

this was typed in XP since my email lead me here
mean while the Ubuntu 12.04LTS is running the above & chat ! [ with a movie on hold ! ]