I am glad to see that others responded with Mozart (it seems like everyone usually says Chopin). Mozart is definitely my favorite. Every once in a while, I will focus on another great composer - whom I also love - and I even think for a while that they are my new favorite. But, I always gravitate back to W.A.M. I've been watching some youtube videos of violinists lately - mainly concertos - and I am not familiar with the pieces. Several times, I have thought to myself, "Ooh, I love this one," only to notice that it's a Mozart piece. It's amazing to me that he was able to come up with so many lovely melodies.