Great quests

[Striiker]

I was wondering if people would mind sharing some of their favorite quests here. I thought others would be interested in hearing about these so that they could try them. I am sure that there are some obscure quests which yield nice items or which are fun or interesting to do.
When I read through the bugs section, I am always amazed at the various quests mentioned which I had never heard of.
The only real quests which I have done are the Stein of Moggok and a couple class specific ones. Anything else out there that you would suggest?