I use GNOME. KDE is nice in that it allows you to customize everything, but if I want that degree of control I'd rather use a fully customized window manager setup (sway is generally my go-to).

GNOME is also designed to be used in a keyboard-centric workflow, which I prefer. It's a nice comfy default for when I want the option to use my computer "lazily", i.e. just kicking back mostly using the mouse to browse the web, but still has enough power-user functionality to make zipping around without touching the mouse feel good.

I also just like their defaults a lot. If you start to install a bunch of third party extensions etc it starts to get messy and degrade the point of the whole unified vision, and at that point you're better off with KDE IMO.

It's also worth noting that I don't really like the default Mac OS UX -- while I can see why people say "KDE is like Windows, GNOME is like Mac," it's really only a surface level comparison that mostly ends at "KDE uses a taskbar and GNOME has a dock".