FreeBSD
One thing that I’ve never got around to seriously try in my years messing around with different operating systems is BSD, other than the flavor of it your get with MacOs.
Having watch a lot of videos around it recently on YouTube by RoboNuggie on FreeBSD it encouraged me to have to give it a go.
It went surprisingly well the and have tried both XFCE and Mate desktop installs. Something that I’ll look at using more of in the future as a backup daily driver.