I find KDE approach more suits my taste.
The trend for bigger margins in Gnome and MacOS (to unify Desktop UI toward mobile UX) is triggering my OCD and looks childish and unusable (lost of space and distraction for the eyes).
KDE customization options are immense. With minimal effort and without applying a global custom theme you can change window decoration, color theme and use Breeze Dark/Light as a default.
I put the taskbar on the top, resize it and the result is pretty close to what I am used to work with (Mac OS X), simple dock to the mix and customize some keyboard keys and voala - professional user interface:)