Started WoW from WotLK, story focused gamer, litlle bit of PvE and PvP, likes to level alts, liked Cata's dungeons and Alt progression but Cata was a disappointment.
Never liked Pandas, i still believe they do not fit but after MoP i do not mind much.
Not liked the sound of the new talent system, now i think is ok but my micromanaging self wanted more.
Hated the notion of pet Battles not a nintendo/pokemon fan, after playing with i liked them very much, a nice addition to the game. Hated that i had to heal them all the time so i stopped at level 5. Want to continue though.
Strongly disliked the dailies, valor and rep gating. Never really liked Timeless Isle.
Strongly disliked the Scenarios but could be used for story progression as someone here already posted.
Strongly disliked the quality and quantity of MoP dungeons, many steps back for other expansions.
Never really liked the Legendary quest mechanics but liked the story.
Liked questing at Dread Wastes, Klaxxi story was great. Liked Jade Forrest war of vietnam theme.
The rest of MoP quest were the worst or most boring quests i ve played in WoW. Lorewalker Cho was a great character though and its stories were ok.
Crafting mechanics has its problems, worst than Cata. Cooking was boring to death. Farm was ok when you expanded it but was like a no fun job after.
Lore and Story in MoP generally suffered. I am a great admirer of both the chinese and japanese story and culture, MoP was a terrible attempt to imitate. I could see great potential to Mogu as Ultimate villains but was wasted for Garrosh, the worst WoW end-villain to date, imho.
MoP is the most raid friendly expansion of WoW, enabling a large portion of the community to see more content and that might be its great strength to the casual player (as my self). Coin mechanics for loot show great potential, need some more work.
PvP as a casual was fun, sometimes you win, sometimes you lose, neither good nor bad.
In conclusion i think that MoP has its moments but failed on immersion, i was a mediocre expansion. I ve spent much less time than Cata or WotlK.
P.S. High point of MoP was GhostCrawler leaving Blizz, yet as a Ret Pally i am biased .