They like sequential procedures, that they can repeat over and over again to produce the same results. Often when I try to show them how to do something, they reach for a pencil and paper to write it down. I call them the circles because when they get stuck on something, they tend to go around in circles, trying their pre-programmed sequences until they get frustrated and build up the courage to ask for help. Right now, I suspect there are not that many KDE users out there who are circles, as most circles like to stick with Mac and other simpler systems. The next group, I call the Squares.
Squares love Square things.
They believe that every function of a program should be an icon, and I blame square designers for the zany symbols that you can find on a Xerox machine. Early versions of Microsoft Windows were the boon days for the squares, as they were the first group of graphical users to be ushered into the computer world. Squares believe in object interaction - dragging an icon to a trash can icon should delete it. In order to change the value of some setting, they believe there should be a graphical control in a dialog available somewhere that does it. Squares are fairly computer-literate, but much of their knowledge is very superficial, as they try not to venture beyond the graphical interface.