I echo this sentiment. So many random annoyances around the house that I've fixed with self designed prints. Its a steep learning curve but you can start simple. First thing I designed was a spacer to go behind silverware organizers to keep them from sliding around. Still in use almost 8 years later. Horrible print quality and all.

Last year I printed a peg leg for a nonstandard luggage wheel that broke off my suitcase and Samsonite won't sent a replacement for, a cleanable coil denitrifier for a saltwater aquarium, custom shadowbox drawer organizers for a toolbox, and during an aquarium emergency printed a metric to US pipe bushing.

I also put the skills to use for woodworking modeling a set of couch doggie stairs and a couple years ago designing the building for my observatory.

It's a really really useful skill