One of the reasons I rolled a worgen is a quest in the Grizzly Hills. It's called Escape from Silverbrook, and I first did it during the Wrath of the Lich King when it was part of my leveling experience. During the quest, you end up rescuing an Alliance scout, who immediately asks you "Were you bitten? Were you bloody bitten?" I knew as soon as worgen were announced a playable race that I had to level one and go do that quest just so I could say 'yes' to myself when he asked.

The whole zone is hilarious on a worgen player. I constantly found myself wishing I could just get them to do the ritual and learn to control their bestial impulses, and fighting Arugal's ghost at the end was simply sublime. Going to Tanaris on a goblin character might be close, but it doesn't really live up to it.

So, have you rolled a character just to do a quest chain on him? Maybe a forsaken to go through Silverpine?