What really helped me like classical music was liner notes and Bugs Bunny (note the music in Bugs Bunny cartoons). Comming from country and rock, I was really used to 3 minute songs. A lot of classical is 15minutes at a stretch, sometimes more.
If there are any movies with classical music that you like, that is another good place to start. Two movies that are good (but their acuracy is very questionable) are The Immortal Beloved (about Beethoven) and Amadaus (about Mozart). Amadaus lets your hear the music in his head with sudden changes as people and events come and go.
Look for "Light Classics" CDs that have many composers.
Here are some favorites:
*Ravel's
William Tell Overture (aka The Lone Ranger theme - its actually about spring time)
*Tchaikovsky:
1812 Overture (who can't love music that uses
realcanon's
*Dukas:
Sorcerer's Apprentice
*Greig:
Hall of the Mountain King
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Flight of the Bumblebee is a violin piece that several rockers have done with electric guitars.
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The Four Season's is very easy to listen to (for me atleast) and once you know the basic outline of it (storms, the calm after the storm, grassy meadows, etc.) you really get a feel for it.
Most Classical music that I know of, the composer was trying to paint with music. For me, it helps to know the premis behind the piece. Its doubtful you will like it all, but with a little exploration, you are likely to find some you do, something that just connects.
(as a side note, my favorite composer it Rachmoninov, which probably says something about my often melancholy personallity)