Some of us love this stuff so much, we make our careers doing it
BTW, moving lights are really nothing more than robots, lots of stepper motors and gears. Take away the optics, and you could have a neat robot. All us moving light programmers do is tellthem what to do, and when. We are kind of where art meets technology.
I just got finished doing the Upfronts for the Univision network in new york. We had over 100 moving lights, and I ran a number of catalyst systems, which allow us to do video stuff as well, along with projectors which I can remotely move along with the lights. Pretty cool, considering I had three dual 2gHz G5's, one for monitoring with a couple of flat screens. (my control setup is in my "who am I" pic, 5 screens in all)