I had an original PS/2 model 30 for a while which had a similar clickety clack keyboard. It's lucky my mother was a heavy sleeper because her bed was on the other side of the wall my computer desk sat against, and I'd usually be typing away all night.
Once when I was doing consulting on a computer that had one of those keyboards a staff member remarked that my (fast) hunt and peck style was quite calming when compared to the rapid clatter of someone touch typing on the same keyboard.
