My guildchat is filled with "this quest is my favorite part of Northrend so far" or "I love Old Kingdom" or other effusions about loot, zones, etc. It's fun listening to all of my guildies enthuse about their favorite things and knowing that I'm not alone in finding WoW more fun than ever to play.

My favorite part of Wrath of the Lich King is anything having to do with Death Knights. I love Ebon Hold and all of the Death Knight beginning quests and my ghoul and Desecration and and and... Well, I could go on about it forever (though I'd rather be playing mine). I even think it's fun that Outland has been infested by Death Knights and the players who want to gank them. And, of course, I love Siouxsie.

What is your favorite part of of Wrath so far? Have you completed a must-do quest? Is there a new instance that you particularly like? Do you have a new item that is your absolute favorite? Feel free to squee in the comments below.