Cata questing was too damned railed. The actual content of the quests weren't bad, but I liked choosing which area of the quest zone I wanted to do next. After helping the Warsong Offensive root themselves in Northrend, you could choose between helping PETA, helping the naga priestess kill Leviroth, helping Bor'gorok Outpost, helping the Kirin Tor free that mage lady, or getting Malygo's minions out of the Kalu'ak ruins. That sense of choice kinda went down the drain with cata.