Nicholas Hooper is an amazing composer. He does such a fantastic job on every piece. And, seriously, there is so much... well, seems like plenty of work involved in producing the score of a film and quite a schedule. My favorite track from "Half-Blood Prince" is "Malfoy's Mission". What emotions you feel from that track. I also really like "Into the Rushes", "Weasley Wheezes", "Slughorn's Confession", "Slug's Party" and "Journey to the Cave". Overall, I love the entire score. Absolutely brilliant, fantastic and awesome.