KDE for sure. The modern versions look exactly like how I want a desktop environment to look out of the box, and they keep the full range of customizability that a desktop should, IMO, allow it's users to have. Which is something Windows just kept slowly getting rid of over the years.
I also prefer to have a taskbar that is ever present with a traditional start menu that's cleanly organized by category rather than the current full screen pop up "activities" search thing gnome does nowadays.