Windows 11. I play games and my PC is hooked up to an HDR tv, so it's easier than 10. I also don't want to be left behind on tech/UI because of my stubborness.
I don't think it's an improvement over 10, especially the Start Menu. I've had to do some 3rd party tweaking and change to Enterprise edition so I can get rid of "recommended" stuff.
I've had some small experience with Ubuntu and Linux in general via a laptop server and seedbox but I just find it too bothersome to do small tasks compared to Windows. I'm sure it'd change eventually but I don't want to have to look up a command every time I want to change something.
Maybe I just haven't come across it yet, but I'd like to make threads left-aligned and everything smaller (text, thumbnails etc.)