Another interesting thing about Haydn is his piano sonatas span a large time period, and you can see his development, as well as the maturing of the classical style in the 50 or so sonatas he composed.
Why are mozart's sonatas so dull I wonder...His symphonies are quite good, but his piano sonatas...Blah... They lack something....You'd think a musical genius would realize his own, dare I say it, MEDIOCRITY! -Tony-