Well, I'm a trackball fiend myself. Many years ago, one of our ATC types was showing off to me his fancy new radar display which incorporated a heavy trackball, and I was hooked! I mean I don't mind other peoples mice, but I don't use them myself. Trackpads seem to have got better over the years - likewise I can't stand the "nipple" so have never bought a laptop fitted with one, however there has always been a trackball in my laptop case for precise work. However, I hardly ever get it out these days as the trick of rolling my finger on the pad seems to provide the necessary precision with drawing/drafting programs.
P.P.