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.