well this brings back some memories.
Wrath was the best. It expanded the game to a point where it had the highest number of subs ever, one of the greatest raids ever (ulduar. basing that opinion off of the lore of the raid, the fact that it's the first to put in "heroics" into raids, and it was just actually FUN), and expanded lore by a good chunk. It also related back to warcraft III, which many people have played and enjoyed.
I joined in TBC and I've liked wrath more than anything. But I also have nostalgia for it, so my opinions are bias a bit.
I see how it is Goldie, im just not good enough anymore
*cries and runs off*
"Would you please let me join your p-p-party?
For some reason I cant see my liking the PvE in MoP (If I was planning to PvE anymore anyway), I have no issues with pandas but the lore doesn't interest me either.
And I agree, wrath lore was awesome - though I have not played any of the Warcrafts.
I am a fickle person.
I've only played WC3, and that's part of the reason why I loved WOTLK so much. Also, it was the only expansion that i honestly enjoyed a whole hell of a lot, because i did everything. raided, pvp'd, roleplayed. It was just fun. That fun died in cata, and now i'm not even playing come pandaland.