Just finished leveling to 90 in this new expansion, the quest chains are amazing, there great story's played out and you really get to know the characters that will play a role in this expansion. Really fun and not at all a grinded type experience.
It really is packed also with so much to do that your overwhelmed with what to do next, Pet battles have been a huge hit with everyone i played with, Dungeons have been really well introduced and enjoyed, everything from creating your own Farm, scenarios, challenge modes,new lvl 90 daily hubs bring a whole new level of game play at 90 even, and a whole lot more has been perfected better than any other expansion so far for high level content ( where the real game begins! )
Now provided Blizzard keep the patches coming with more content such as they did with this im sure this will keep everyone that play's and enjoys Mmo's at there finest entertained for a long time to come.
An amazing start for Mists of pandaria.