Well, music is the obvious choice for many, because we're so emotionally connected to music, myself included. Literature is, of course, very important. So I would hold those two above the rest. After that, architecture is truly one of the more interesting things I've ever taken the time to look into. I really do recommend people to learn up on architecture, because it's absolutely fascinating how the simple design of the building can completely motivate a specific purpose and feeling while in the building. I've always loved to look through pictures of Zaha Hadid's designs. Truly revolutionary and progressive.