@double_a_runi I am very picky about margins on interface elements and IMO the ones in GNOME are Good and the ones in KDE and FVWM are Bad . Despite this I may switch to KDE at some point simply because I very much like Qt.
My current plan is to shelter in place until Cosmic lands (see post elsewhere in thread) and if I'm already doing that then switching to Kubuntu only to quickly tear it down again is not a good use of time.
@mcc @double_a_runi You can install multiple DE/WM and swap between them to try them out without installing a new OS. This command offers the basic options, but there are more:
sudo tasksel
At the login prompt when booting up, there is probably a drop-down somewhere to choose which of the installed options you want to boot into this time.