Its hard to pick.I love the whole expansion.
The Black Market Auction House is my favorite thing!Seeing all this old and rare stuff come across there is awesome!
I'm not going to Sugar coat this comment and want to win or anything ^_^, But i like how they brought back World Bosses kinda a feel that needed to be back in the game
The continent, exploring new areas has always been fun with the new expansions coming out.
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My favorite part and what i really enjoyed was zones artwork and design.Questing in them was really fun the best one Blizzard ever made.
My favourite part isn't really one specific system or "thing", it's that this xpac feels as though it has a greater variety of things to do. When you get tired of running heroics, go pick away at some pet battles, when LFR becomes too agitating, go plant some crops on your farm, etc.
The Tillers. It's like Farmville for WoW. No, seriously, I like the multi-mob looting.
The Pandas. For sure.
Daily quests. I'm glad they brought back grinds. Also like so many rare spawns - mobs, chests, etc. Lots of stuff to do! :)
Fast is goodFASTER IS BETTER!
Hands down, it's training pets.
I love the storyline especially Valley of the Four Winds.
My favorite is what they've done with the factions. It's no longer grinding 24/7 in a dungeon tabard getting to exalted in no time, now you actually have to earn it in a slow rate and the rewards are great (epics, recipes, mounts). It gives you an actual feeling of an achievement when you "ding" exalted with them + some give epic quests at exalted with some very rare rewards found nowhere else!
the best part for me is the daillysi love them
Honestly, the best thing about Mists was that it got me back into WoW. After taking a few years hiatus, I forgot how enjoyable it was meeting new people every single day. My friends list is burgeoning once again!
AOE looting and the removal of the daily limit can grind out the new reps without limiting myself on the old ones I'm missing