[Tubbs13]

Mines Arch Linux with i3wm installed.

[Josiah23]

Windows 10 for Gaming, video editing, game development and many other side hobbies

Kali Linux for pen testing & privacy

[ApatheticEuphoria]

TAILS for anonymity and privacy.

[pack3tz]

backbox with trustedsec's PTF installed

[pack3tz]

im pretty over kali at this point. backbox seems so much smoother and the PTF covers any missing tools i commonly use. Either this or BlackArch if you have the time to really learn how to use linux

[protonrotuing]

Interesting enough you ask, I would have to say Mint Linux for the beautiful, classic aesthetics.
But if not Mint Linux I'd have to say Gnome 2 / Ubuntu Mate

[zenTHEgreat]

I'm liking gnome linux, Kali, and I want to use Arch

[phaz0n]

My favorite OS is probably Gentoo GNU/Linux.
I know it's sort of a meme distro but it runs extremely fast (being source-based and using a manually configured and compiled kernel) and being able to configure absolutely everything makes me really happy in an autistic sort of way.
Been using it as my daily driver for 8 months now, and it has basically everything I need for development as well as entertainment.
As a side benefit it helped me kill the obsessive gaming habit.

[Yaiba]

Windows is my favorite, but I can't be sure yet since I didn't try all the OS.

[Nyx]

Windows 10 is my favorite, I just wish it had the privacy of Linux. I'd make the switch to Linux if it had the capability to run all the video games I want to play.