Pretty interesting topic.
I have to admit on some toons i skip questing all together.
But my favorite quests are NEsingwary, like you guys.
But to add something new....
I realy like Horde Northrend Leveling Guide - D.H.E.T.A.'s Little P.I.T.A.
I like to pretend I am personnaly trolling Pamela Anderson.
Infact both the Fjord and Tundra questing lines through out I tend to do. Once they are done, it's just dungeons ect until Cata.
For classic quests I like the undead starting quest line and the follow up in silverpine. The stonetalon questline was really well done to.