I’m currently testing Fedora KDE on a VM (windows host) before eventually switching over to Linux completely.
GNOME. A lot of people customize it to look and behave more like Windows or Macos, and I used to as well, but after giving the default configuration a chance and getting used to it, I prefer it over everything else. It’s way more focused and organized, and I can navigate through my open windows quicker and easier. It’s just a different workflow you need to adjust your brain to.