What is your Primary OS?

At work:

  • Windows for office work
  • Linux Mint VM for software development

At home:

  • Dual boot desktop with Linux Mint (default boot option for general usage and gaming) and Windows (for those few other games)
  • openhabian (RasPi 2, controls smart home)
  • Debian (openmediavault)

I’m thinking of switching back to Ubuntu once this Unity madness is over (18.04+)

Primary? Not Win$.
On my business Thinkpad it is RHEL WS (for security).
At the SO customer Win 2012 and 8.1.
At home: CentOS 7, Mint, and a good old XP in a VM for legacy applications (Lego Mindstorms, Nikobus, …)