GNOME, because it's the most modern-looking DE Linux community has. And it's usually the first to get all those shiny new features (Wayland, systemd, pulseaudio, pipewire). Sometimes it removes some outdated concepts from the 90's, like desktop icons or systray.

To be serious now, I really contemplate switching to something more sane, like MATE again. But reinstalling Stretch and upgrading it all the way to Sid is too much for now.