Expansions make (or sometimes break) an MMO. What do you think has been the best or a couple of the best expansions to an MMO that you think has made the game better and moved the game forward in a positive way?
Guild Wars: Eye of the North will always be my favorite I think.
EQ2: Shadow Odyssey was a favorite one of mine as well.
WOW: The Burning Crusade is a classic.
Recently I think the Thieves Guild DLC for ESO has been great.
What do you think?