Hey, I like the contast to begin with in instrumentation, rhythmic diversity,wake up the cellos and stop the other strings from just counting, but then....the always monumental entrance of voices to add the personal dramatic charm that human entrance can lift to all else! Simply.The rhythmic diversity and human voices inserted keeps interest building up. AND NOW GIVE THE PERCUSSION SOME TOO. (While we can catch a melodic pause), key changes add the color to continue on.....brass gives a little syncopation to notice and what color is added to long notes intruding with rhythmic pattern. Great!