Fun to draw, yes. But not always easy to draw.
And Godzilla's line work was so thick that the xerox machine couldn't properly print it onto the cel. Alison Leopold and the crew in the ink and paint department had to paint in a lot of the lines.
As one of the greenest of the new recruits at the Hanna-Barbera studio, I had a lot to learn. I'd stay late and take work home over the weekends just to keep my footage up high enough to not get the boot. As assistants, we worked for the animators, and some of the animators, all seasoned vets, drew very rough poses and it wasn't always easy to figure out how to clean up their poses. The following sketch pretty much summarizes my first few weeks on the job.
I had A LOT to learn...