World of Warcraft Music Q&A

GameSpot has posted a short Q&A with World of Warcraft composer Jason Hayes about the music he created for Blizzard's ultra successful MMORPG.
Q: How tough was it to create a soundtrack for two factions (Alliance and Horde) and convey it musically?

A: There's definitely some traditional feelings about Alliance versus the Horde, and what those mean and it's a little bit tricky because there's no one faction that's an evil faction. The Horde has certain feelings that can at times feel a bit darker and at times a bit more barbaric. But recently in the lore of the universe, certainly the Orcs have become in some ways very noble--kind of a quest to redeem themselves and they have a nobility. Defining the regal qualities of some of the Alliance, to the Alliance characteristics and differentiating them from the Horde, is a great challenge.