My favourite expansion was cataclysm cos while playing it was that i met my wife, also i have very good memories about it dungeons and raid early in the expansion ^^
WoD will be first expansion that i experience when it first comes out. I started playing when MoP was already out. So I would say MoP simply by default, but I do have to say that I really enjoy all the WotLK content. So I'd probably say that.
Cata was easily my favorite expansion so far. I loved the lore it added and seemed to tie in well with existing storylines.
My favorite so far is Mists of Pandaria because of pet battles. Pet battles is one of my favorite things to do in my off time so i'm glad they added it.
Wrath of the Lich King was my favorite expansion.
Wrath was my introduction of the game and I've been hooked ever since. Plus, it had Ulduar. Love that place still!
My favorite espansion set was the burning crusade. I really start to understand the game during this one and it bring me real pleasure !Hope to re-found this pleasure in WoD !
My favourite expac is Burning Crusade because that's when I started playing and met a bunch of awesome people who I'm still friends with today!
mist of pandaria
I can't really pick a fav since I started from Cata, but I'd like to say WotLK might be my fave just because playing Ulduar was mad fun and Lich King is a beast.
I play World of Warcraft since its final beta (2004), and I can easily say that the best expansion was The Burning Crusade. Why? Simply because it was the one that provided me more fun! And that cinematic with Illidan challenging us? "YOU ARE NOT PREPARED!", Illidan saying that is iconic! Wrath of The Lich King was also great, but The Burning Crusade was the best, and the one I miss most.
The Burning Crusade was the best for me doing Kara with my guild was the best time of my life
Wrath of the lich king for the history of arthas
My favorite WoW expansion so far has been Mists of Pandaria due to the great difficulty and quality of raids!
I started playing in the year before Wrath, so I'll always remember the Scourge Invasion pre-expansion event and how much fun I had getting to know WoW and questing through Northrend. Wrath of the Lich King was definitely my favorite so far.
My favorite expansion was Wrath of the Lich King because it was the first time i raided with a guild since Vanilla andmade sweet gold on epic gems:P
Mists of Pandaria
I want to say BC, the expansion I got my start in and began to raid and truly play but it is Wrath that is my favorite. The sights, sounds, quests and experiences of stepping off those boats in the beta all the way till raiding ICC are the most amazing memories I've had in any video game even with all the negatives and 'Wrath babies'.I really wish I could relive those gaming moments :')
Wrath of the Lich King, best and prettiest so far... greatly hoping for new beautiful places to play in!
The Dark Below!Oops, in case that dq's for some reason I change my answer to Wrath of the Lich King.