I commented in the other thread that TOR is by far my favorite quest(that I have done). It got me thinking about the "bad" ones.
The one I can't stand the most is VOD.
1. There is no rational way to beat the quest currently. (possibly be different at level 20)
2. Stand in one room.
3. Half of the characters in the raid do very little after the fighting starts.
4. Use a ton of resources and then wipe 95% of the way?
IMO it is just boring and the most not-D&D quest in the game. Oh well.