Drawing & Painting
I have been doodling since I was a kid. Most of my spare time during middle school was devoted to an unfinished fantasy manga. Neither the artwork nor the story were good in my own judgement today, and I never shared it with anybody during the several years of creation or afterwards. But I think it was the purest joy and desire for drawing and dreaming.
During my PhD years, I started developing interest in other styles (non-cartoon), and learning to draw and paint more seriously by taking (online and in-person) classes, and practicing a lot. Now I draw regularly and post my artwork on Instagram.