Something I've noticed as an illustrator and designer: there's a unique thrill to making pattern repeats. You gather up a collection of charming little ideas and things on your artboard and arrange them just so. Then put it all to the test with a quick command of copy + paste. That moment after all the fine tuning and tweaks are finished and your repeat finally works. That's thrill you're after. Perfectly seamless, with no gaping holes or visual imbalances. If it passes that test, your work is done.