Toccanta in D Minor follows a clear system which is quite Ni Te or vice versa style.
For those who are a bit into socionics - he looks ExTJ. (eyebrows'n'stuff)
Mozart style - Eine kleine Nachtmusik - happy and carefree, 7ish.
Beethoven - Moonlight Sonata - Dark, pure emotion, 4ish. Come on, it must be INFJ.