WoW quests seem to be pretty formulaic. "Bring me some number of this item or kill that number of mobs." I guess there only so many types of quests that the developers can make. In order to ensure that you get enough experience from some quests, they assign a ridiculously low drop rate. Sometimes I think there are sensors in the keyboard that measure one's level of the frustration by how hard you hit the keys. Once you reach a certain threshold, the item drops. I'm probably wrong about that.
There are some really fun quests in the game. My favorite is Ally of the Netherwing. You don't really have to do anything for the quest, since you've already killed Zuluhead the Whacked. You just take a ride on a Netherdrake and get an awesome reward, a stack of gold, and oodles of reputation. Ok, so I really just like the dragon ride.
I also like Mission: Gateways Murketh and Shaadraz and Mission: The Abyssal Shelf. There's something awesome about flying about doing massive amounts of damage. Although it's still a taxi service, at least you get to do something from the air. Although it's still a kill-count quest, it seems different from the others.
What are your favorite quests?