Haven't been listening to it a lot recently, but I've put a fair amount of hours into classical music.
Familiar with most of the "mainstream" classics, such as Mozart (Requiem and various concertos), Beethoven (Symphonies), Vivaldi (4 Seasons), Bach (Brandenburg Concertos, Suites, Organ works), Tchaikovsky (Swan Lake, Nutcracker, some Symphonies), Liszt (Piano concertos), Grieg (Peer Gynt Suite), and Händel (Messiah and some smaller stuff).