I don't have a favorite piece (too hard to decide), but most of my favorite pieces are by Chopin.

Of course, Grieg has some of the best pieces, but I do agree on Chopin, too. In general, I like an eclectic variety of music, including some more modern pieces.

I like the Liszt b minor sonata, it's my dream to be able to play that piece...

http://www.youtube.com/watch?v=1CBbrqfWZ7c

like this one!

Claude Debussy's Clair De Lune