I would say my favorite thing about Linux is programming on the platform. Recently I have been learning graphics with SDL2/OpenGL and different graphics under Linux. I graviated towards the platform due to the command line and the vast information about programming and knowledge available.
I use Debian mostly and CentOS due to the stablity of rpm based distro but mostly stick with Debian. I started off with slackware back in the day. I mostly use programming languages: Python, Go, Java, PHP, Bash. Most my projects involve Linux.
Projects on GitHub: github.com/electronicsleep