Usually when I'm just chilling is the only time I'll listen to classical. It's good music to surf EF to. It does make your brain feel more "awake". I can only handle small doses of it though (typically an hour or two at most). Actually any kind of music more than that length of time and I start getting bored.
I want to find good recordings of Beethoven's symphonies. Chopin, Liszt, Rachmaninov, and Wagner are also good.