The drop-off point for a lot of WoW fans, myself included, but it gets a somewhat unfair rep. I absolutely loved the reworked zones (although the decision to leave many of the weakest zones, especially compared to the vanilla ones they spruced up, is an odd one i.e. Ahn-Qiraj, many of the Kalimdor zones) and the new dungeons do a lot to make the staler patches of early-level content much more enjoyable. The newer zones are a mixed bag, though, especially spaces like the Twilight Highlands and Uldum that feel run-of-the-mill in their writing and quest design. I think what really sunk this expansion for a lot of folks was the slow roll-out of new content and the absolute shitshow that was the overarching plot of Deathwing/the Elder Dragons. Blizzard has always been ok in regards to their writing, but this was a new low for them that I'm not sure they ever fully recovered from. Maybe someday I'll go back and catch up on WoW, but I think Cata marked the end of the golden era for the game in ways that ultimately keep me finding the motivation to return.