Two things I've learned about my UX preferences while playing around with #openbsd and #fvwm and watching a few videos on the #CosmicDesktopEnvironment
I prefer full screen apps on smaller displays. (Including laptops) I blame cell phones for this preference.
When having more than one window on a screen I prefer the way fvwm or cosmic handle it by changing the color on the window pane or frame. This eliminates the need for often hard to make out visually window shadows or having to tint the non active window slightly. Like Gnome is currently doing.
I wish there was a way to do the same thing in Gnome with accessibility features or even an extension for gnome shell.