Triggered a great lost memory: When I was on a dev team testing the graphing systems for a scientific data presentation software back in the early 90s I would try to come up with "fictional data sets" that would make interesting graphs. I tried to make them pretty, or weird, or just break the systems. Occasionally, it was so interesting I'd end up looking at the data / formulae that lead to the graph / design. Great creative space to be in for jumping back and forth between math and art.
I'll dig through the notebooks and see if there are any left. I printed them out when they got interesting. I can already see this turning into an all-day session of reviewing the decades of odd projects that I've forgotten about. Maybe that's the project for next week. Like some people list all the concerts they've been to, I'll attempt all the projects I've done over the years. The hacker's equivalent.