People here are posting you with random classical songs,im not saying its bad,but you need to know what youre listening to.Let me start you off with the basics.
I think that one of the most sentimental composers has been Antonio Vivaldi. His most famous pices were the four seasons in which he represent boldly using differrent techniques in each one.
The most famous classical character has always been Ludwig Van Beethoven,he was one of the main composers in the Romanticism era.So they were dedicated mostly to love.You could see it in the beauty of "Fur Elise" (For Elise in English)
Franciszek Chopin has been one of my favorite composers,mostly how he interprets the paino.HE used to be called by the High King when he was only twelve.The King was mad and the only thing that seemed to calm him was the boys music.
http://www.youtube.com/watch?v=gCPnUFmIJWM&feature=relmfu
Hope this gets you started out,if i were you i would go to a local library and pick up one of the old books on Musical Appreciation if you really want to learn.I own a couple of books on this.The only way to fully appreciate classical music is learn an instrument like Piano.It will show you how advanced these individuals were from our time.Hope this helps you out c: