Physics is my favorite class, I have 3 science classes currently. Subjects on energy and motion are fascinating. 
Really, what are your other two science classes?
I have Biology and Chemistry as well, I like them too. Physics is still my favorite though. It;s one of the oldest academic disciplines.
I am more of a Biology guy myself, but Physics is very respectable.
Biology was developed the most in the Middle Ages, it was mostly Muslim physicians and scholars, one of them is Aviccenna.
That's interesting, I never knew that.
It's interesting how at the same time Medieval times haven't been as advanced. Many people simply "trusted God and church" to heal them.