I sold computers for almost a year, back in '95 and I feel for that guy. I had a nervous breakdown doing that job. In fact, to this day, I have an unlisted number to keep freaks calling me up with idiocy like "You sold my friend a computer last week but I have a macintosh and I wonder if you could give me some help"
The very worst was the OS/2 WARP! crowd, which I equate to the linux people of today. They were loyal but fanatical. The OS was hard to use, with little or few drivers, but the ones that could tough it out and survive thought they were king ---steaming pile of meadow muffin---.