Hall of the Mountain King! One of the very first pieces of classical music that I heard in my life at the age of 5! This song is a major factor why I love classical music!
Actually, this is also my "thinking" music whenever I am puzzled in an equation, theory, or life in general. :?
[video=youtube;dRpzxKsSEZg]http://www.youtube.com/watch?v=dRpzxKsSEZg[/video]