Well, I have had to listen to 1812 Overture for music.
Whats your favorite part?

Or favorite part of any Classical music?

Or... just music?
FWI, this is the Finaly of the Symphony.
Or
Mine is - In this video, mine is 42 seconds in.
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Now post away!
For if the video doesn't work -
http://www.youtube.com/watch?v=tQDEZHyBwuQ