I don't know, for me MoP is like fixing everything what Cata failed. Raids are taken seriously, dailies/pet battles/challenges etc. keep you entertained. And the future looks promising despite the fact how old is WoW.
I like story. I am looking forward what happens next.
My favorite part(s) of Mists of Pandaria is the inclusion of Battle Pets, Mass Looting, Relics hunting, and the general feel of the areas. After having collected as many pets as I personally could it is good to see they are good for something other than following you. People compare it to Pokemon, I see how it can be like that, but I see it more as a Final Fantasy-esqe input. The Mass looting system makes farming easier than ever especially for Tailoring when you reach Frostweave and Embersilk. Relic hunting is always fun for me right after a weekly Mait, It makes sure that I see every area of Pandaria instead of never visiting all but a few areas for the endless dailies. Having loved Ancient Asia, I love how MoP decided to give everything a grandeur of China (while including my favorite animal as a race) instead of the death and destruction that I'm so use to from BC, WoLK, and Cata.
Pet Battles are really cool, the graphics and theme overall are fantastic!
AoE looting is a godsend but the Monk Class has been pretty damn fun as well. The Brewmaster spec has actually made be enjoy tanking for the first time since late Wrath.
The music, certainly. It helps create a very immersive environment.
For me its the added companions, mounts and achievements, Im a bit of a collection freak. I was not looking forward to the Pet Battles but now Im actually enjoying them, bring on more pets! woot! Never enough pets!Edrillia
what to say, what message to send, what to whom, I send a message to those who see but do not hear, listen and do not see Panda FTW
I really love the idea of having a farm of which you have to take care (The Tillers) and the PvE content, as it contains a lot of new mechanics and interesting boss fights which require more than a simple Dps/tank/heal Rotation
My favourite part of MoP is AoE looting ! :P
I really like the lore and the unique story lines of each zone. Oh, and the music.
I absolutely love the ambiance in the zones. Jade Forest, Valley of the Four Winds and Vale of Eternale Blossem are absolutely gorgeous. Also...the soundtrack.
Pet battles! no doubt.
My favorite part of MoP has been soloing the WotLK raids to try to get the mounts! but my favorite new feature is probably the pet battles and challenge modes
My favorite part of Mists of Pandaria are challange mode dungeons.
Love the new raids and the mechanics. AoE looting is great (especially when farming old content). And the new JC mounts!
My favorite part is the cheap, quick, and easy way to reglyph/respec.
My favorite part of Mop is the dailies and and valor buying gear system gives players a sense that they need to work for what they earn.
Meeting & interacting with Shen-zin Su
Soooo much win with that beast:D