Originally posted by: Madwand1
You can find such collections pre-made in record stores.
Or you can take it in progressive steps. If you liked Mozart, try more of his works. Check the details of the soundtrack, look up what you liked, and listen to more of his material from the same periods / collections / ensembles.
To back up a bit historically, try e.g.:
Vivaldi: The Four Seasons
Bach: The Brandenburg Concertos
Handel: Water Music
