Beethoven often dipped his head in cold water before composing!
Beethoven loved cooking, so much so that he named one of his pieces "Christ! On the Mount of Olives"
He was jealous that Rimsky-Korsakov wrote an opera called "Mozart and Salieri" instead of "Mozart and Beethoven"
He designed one of his piano sonatas to be played with building implements and called it the "Hammer-Klavier Sonata"
He wrote another of his sonatas entirely at night and so called it the "Moonlight Sonata"
Beethoven's father was an alcoholic and emotionally abusive to Beethoven when Beethoven was growing up;
Beethoven's height was 5' 3"
Beethoven had unusually bad skin;
Beethoven was very temperamental and would end performances if he became aware of anyone in the audience