Hmmmm... nice to see Schoenberg actually doing something good with himself for once... Hehehehe... just kidding. I know that some people actually like his music a lot... so I'll shut up about that now...

Also: I'm insane as it is. Thus, when I refer to something as "insane", that means that I find it absolutely marvelous (unless otherwise noted). I love the energetic, dark, angry pieces. They make me happy.

The ballet one was very intresting. I enjoyed it thouroughly. Thanks for posting that.

My two favorites of the Haydn sonatas are Nos. 50 in C (as Hunwoo suggested) and 62 in E-flat. The most recent Haydn sonata I learned was the E-flat and it is one of the more virtuosic sonatas of his (as virtuosic as Haydn gets, anyway). It is also very beautiful, with lovely melodies intertwining themselves in all three movements.

A thorough study of either of these sonatas would definitely help you improve musically and technically.