What I know about art could fit into a teaspoon. I know that I generally prefer the Impressionist and Post-Impressionist Art over modern stuff like Cubism, etc.
However...my favorite piece of art is an Expressionist piece...which is probably closer to the modern than not.
This is called "Bride of the Wind" or "The Tempest" by Oskar Kokoschka. The colors are gorgeous, but I really like the wide strokes that somehow emulate a storm...in which a couple lay, calmly relaxing. But...I've always wanted to know...why is the woman sleeping, and the man wide-awake?