While working at a tedious job in the summer of 1963, Jerry Gretzinger began drawing a map of an imaginary city. He added to the map fitfully for 20 years, put it aside, and then took it up again when his grandson found it in his attic. He’s now been mapping the area around “Ukrania” for more than 30 years, working an average of 20 minutes a day.
I prefer his "literal" period more than his subsequent randomization and "void" material. Sure, if I were doing something for almost 50 years, I'd probably welcome a bit of the unpredictable. But the world-building elements are definitely my favorite part of this project.