I also love Darnassus (so quiet), the Blasted Lands (I'm really fond of the redesign there), Charge (so much fun), Blackwing Lair, all the weapon models from Blackwing Lair and especially Ashkandi (which you knew already), and tauren in plate. This isn't a comprehensive list (I left draenei and worgen in plate off of it, for instance), but it gives you an idea.
So we come to the part of the BT that I love -- namely, asking you what you love. Do you love Cauldrons of Battle? Vanity pets? Scrooge McDuck? (That last one's just weird -- he's not even in the game, guys.) Share your love with us.
World of Warcraft: Cataclysm has destroyed Azeroth as we know it; nothing is the same! In WoW Insider's Guide to Cataclysm, you can find out everything you need to know about WoW's third expansion, from leveling up a new goblin or worgen to breaking news and strategies on endgame play.