Re: @RegGuy1
The buzzphrase you are probably looking for is "focus follows pointer". Windows had it natively as an option starting with Win95 (registry hack ... I believe TweakUI could make the change). It's useful for some things, hellaciously annoying for others. I use it probably once a month or so on Slackware w/KDE (pointy-clicky: System Settings -> Window Behavior -> Window Behavior -> Focus, a slider gives 6 different variations on the theme.)
I have three monitors, the native laptop screen, a much larger external monitor, and a dumb terminal. The laptop has 2 virtual desktops side by side, just in case. I rarely use more than one. I can also hot-key into 6 command prompts (this last is stock for Slackware).
The external monitor has 6 desktops, in a 1x6 grid. 5 are in near constant use, the 6th is kind of a scratch pad.
The dumb terminal is just that ... IBM 3151 (amber) at the moment. Handy if the GUI goes TITSUP[0] (rare as that is these days), and I do most of my serious writing on it.
[0] Total Inability To Show the Usual Pr0n^H^H^Hictures.