Software Development
I've always been fascinated by coding for it's problem-solving potential, and have found that implementing code into an interface is a great way to improve usability and shareability.
My preferred tool for software development is TkInter, because of how intuitive all of its functions are. It's the perfect Python library for prototyping or just building something that doesn't need to be perfectly polished (I also personally like how it looks/feels a bit retro).