Columbia: Please tell us what academic class has been your favorite and why. (1500 characters)

1472-character version: Columbia
Although I had studied chemistry in high school, I was merely interested in laboratory experiments back then as they were the ventilator of my frustrations, never really giving serious thought about the principles of chemistry and their implications. Even after matriculating to NYU Poly, I could not rid of my old habit of mindlessly copying the lecture notes...