I theorize that the best art that stands the test of time has mass appeal and is original. I feel that in order to create art like this, takes an insane amount of depth of analysis and countless hours of exploring music that inspires you to develop your craft.
I find Elfman a true genius whose music is great as accompaniment to film and stand alone works of art.
His eccentric sound that appeals to the child in all of us really does it for me!
I'm a big fan of Elfman. He is an extremely talented composer. His pairing with Burton on so many films creates the perfect atmosphere and moods for those movies. One of the best composers alive today imo.