You never really get to appreciate the music in World of Warcraft. Most people I've spoken to play with the game music off, though that does not account for the entirety of players. I just find the music repetitive and distracting, as I spend most of my time in battlegrounds where the music isn't absolutely stellar.
Storm Peaks is absolutely breathtaking. You can't really enjoy the immense, overwhelming feel of the zone without listening to the titanic orchestra that accompanies it. I wasn't too impressed with the Icecrown music, but it certainly did have a very nefarious feel to it. Howling Fjord has a collection of some of the arguably best instrumental pieces in the game. Nothing stands out in regards to Borean Tundra, and I can't even conjure up a memory of that zone's music.
The looming orchestrals of Ulduar were absolutely brillaint. "Titan Orchestra", or the theme of the Iron Dwarves, got its own reprisal in the new Cataclysm theme, "The Shattering". This new version of the theme is packed with beautiful, harmonized choirs and blaring brass; come to think of it, I'd love to see some video recordings of the "Making Of" or World of Warcraft's soundtrack.
Mentioning World of Warcraft music, we can't forget the epic track "Invincible" that was released with Blizzard's Battlecry Mosaic. With some beautiful psuedo-Icelandic vocals and amazing female choirs, this invoked visions of wind-kissed peaks and bloodied Vrykul hunters nestled amongst the frozen mountains of Northrend.
Playing through the wastelands of Northrend with the music on was how the game designers intended. By turning off the music, you miss part of the experience of immersion in the game. I know for sure that I'll be playing WoW's music during my baby steps into the fog of Cataclysm.
I will conclude this short entry with a question for our readers. Please answer it in the comments section, or in the actual original forum post.
"What is your favorite song in the entire game, and why? Do you have any in-game experiences or memories connected with this specific piece of music?"