In line with the recent best expansion post, curious what most people think is the worst expansion/part of WoW.
By far for me is LK. I didn't play Vanilla but BC/MoP are my favorite.
EDIT: Two thoughts after reading so many comments:
(1) Many of you can't read, or only bother reading thread titles. "Expansion/part" I am well aware Vanilla is not an expansion.
(2) I am really curious (and always have been) about the Cata hate. I suspect a large percentage of it is from players who started in Wrath, and dislike the drastic change Cata took on Wrath design. If there were a way to do it, I wish I could poll just those who have played since Vanilla/early-BC and see if the large Cata percentage drops to more even w/Wrath (as I suspect currently it might).