What operating system do you use on your main computer?

I don't think there's a single "main" computer anymore. My home computer is Linux Mint Cinnamon. My mobile computer (which I use nearly as much as my desktop OS) is Android.

My next smartphone is going to allow installing a privacy-respecting custom ROM (because Linux on mobile really isn't there yet). Once I do that, I'll focus on f-droid apps only. Something to look forward to.