It depends on if you like features and configuration options or not. If you don't like features and don't want to be able to set any configuration options, go for Gnome. Otherwise, KDE.
When I found out that you could apply a theme and, with a few clicks, have KDE fashioned into something that looks indistinguishable from Unity, I almost switched to it just for the novelty.
https://www.addictivetips.com/ubuntu-linux-tips/make-kde-pla...