In my teens and twenties, I would get up at 4am, before school, to chat by Morse code on 80 meters (a low band frequency that worked well after dark). Admittedly, I never got very good (I could comfortably receive at about 12 wpm), but like the article said I liked doing it because I felt like some kind of clandestine spy, typing out my messages on a straight key, and listening for the return messages.
My brother, on the other hand, got REALLY good at it, and watching him copy code at 35 wpm, in HIS HEAD, while RIDING A MOTORCYCLE, was amazing! He said it was like listening to someone speak!
We used to drive our parents nuts, sitting at the dinner table, going, "Ditditditdit, ditdit. Dah, ditdit, dahdah." back and forth.
When I started taking flying lessons, my instructor almost seemed disappointed that I didn't need to ID the VOR with the dashes and dots on the chart as he tried showing me, and after testing me on a couple, sighed and said I was making things "too easy."