Mine is Linux Mint. I like it mostly for its ease-of-use, convenience, user-friendliness and elegance. It's also one of the most well-designed, graphically-speaking and interface-wise. Cinnamon and MATE are fantastic!
It's also a great beginner-friendly/entry level Linux OS.
Mint's logo/icon:
[Image:
https://linuxmint.com/img/logo.png]
Side-notes: I got my start on Ubuntu though. Hardy Heron, I believe. Unfortunately, I am not a very big fan of Ubuntu anymore.
Shoutout to Fedora