Favorite thing when it comes to designing

I love making heros and drawing battle graphics, which I'm getting better at, heh.

Going back, years later, and playing what you've made.

Seeing the world through the eyes of your younger self, and having fun (or not) while discovering the progress you've (hopefully) made as you continue to learn.

Sadly I've never actually finished a game... I was a title screen away from finishing one but I made that game in twenty-four hours.