What motivates you to learn physics?

I guess it's a little different for everyone. Physics ultimately is the study of the universe and every component of it, and physics studies why things are the way they are and characteristics that control the way things act.

For me, I am motivated by my natural curiosity: "why is the sky blue?" ... that sorta thing. I want to know the reasons behind phenomena like why the earth spins and how fast a kettle boils if it has X litres of water. Physics, unlike any other discipline, can explain this sort of thing. And for me that's so valuable as in my opinion the way to truly understand the world we live in is to immerse in the physics behind the way things are.

Curiosity and a desire to know why is arguably the best explanation for wanting to learn physics.

As someone in grade 12 doing physics I can tell you that studying physics is extremely rewarding yet extremely challenging and requires a lot of effort to understand concepts. Good luck and any questions PM me : D