In the last couple of years, seeing my toddler do new things. Any new things. Jumping, saying "cake", eating a new food, today it was making toys talk to each other.

Overall, coding things. I'm incredibly newbie but wannabe game dev. Learning to code as I go copying tutorials and trying to tweak things and mash different ones together until it does what I want. I would spend an entire evening getting frustrated and not understanding error codes and pulling my hair out because invalid syntax and shit. Then finally it would do what I wanted it to do and I could physically feel my brain light up with buzzy happy-chemicals, big grins and jumping round the room like a kid on Xmas.

Then I'd start on the next minijob and break the whole fucking thing...