Being obsessed with something, Kaizen and learning by building

I'm still in Japan, and last week, I mostly visited Osaka and Kyoto. It was quite nice, and different from Tokyo. Not a lot of buildings and it's calmer ( except in tourist places ).

Today, I want to discuss more about the fact of being obsessed with something. It's more of a brain dump than a factual written essay about that, but it's my actual thoughts.