I want to create my own patterns, since my island is ancient Greek (ruins) themed... and if I want that to be obvious I need to create designs myself.
I am not yet really good at it, but I did create some ancient Greek pottery for my pottery area, and those turned out very nice, if I may say so

It takes up a lot of time though, so I am a long way from finishing my island (doesn't help that I do not have the time to play everyday). Next up are some scrolls for my library (since the ancients didn't have codexes/books as we have now, those were 'invented' in late antiquity/the early middle ages).. though I am gonna cheat a little and still use things like the stack of books and the tiny library, primarily because I love those DIYs so much.