Woah, I'm surprised MoP actually has more votes than TBC. o_O Considering all the bad hopes they had for this expansion since they showed the first trailer.
As a person who plays since The Burning Crusade (but also as someone that doesn't have as much time as those days) I must say I actually enjoyed this expansion. Unlike others I welcomed the new asian theme with the new race and class. What I missed in Cataclysm, which was the sense of exploring and discovering the world (pretty much like TBC/Vanilla/WotLK) came back at the beginning of the expansion: Pandaria was a great new place to visit, and the lore, including the characters involving it, were quite entertaining. The new raids, while I did most of them in LFR and while I don't consider them as good or memorable as those in WotLK or BC, were enjoyable and done well for me (my favorite being Throne of Thunder). New activities, like Pet Battles or the Tillers farm, were quite interesting. Oh, and the world bosses were amazing, too. What I didn't like from this expansion: the numerous dailies and farming reputation, most of how the new gear looked, some PvP imbalances (the new last bg is sorta boring, too), the lack of new dungeons while giving too much attention to the scenarios....and that it wasn't quite alt friendly until this last patch.
Overall, I found this to be a good expansion. FAAAAAAAAR better than Cataclysm and maybe a little behind from Burning Crusade. WotLK is still the best expansion for me, though.