Same for me. The one key feature (that everything else probably can be configured to do if it doesn't do it now out of the box) that I mold my workflow around

Same for me. The one key feature (that everything else probably can be configured to do if it doesn't do it now out of the box) that I mold my workflow around is the ability to roll the mouse wheel on the background in KDE and switch virtual desktops that way. For command-line (which I'm in all the time), I use yakuake which slides a terminal window down from the top of the screen like Quake used to do with it's console. This simple feature makes it easy for me to switch between a gui-oriented way of thinking and handling the next coding change in a terminal. You can peel off another shell in yakuake and surf between them. Silly, I know, but for me it works great.