I knew when I bought the Demon War beta that I'd probably end up helping to squish a few bugs, but I wasn't prepared for the town infestation!
Too funny; my ubertough and heroic hardcore weaponsmith/healer running from house to house in a blizzard, looking for a marauding elite named boss? No. An stealthy elusive thief that was stealing from the vendors? No. A massive cache of gold and jewels in a hidden chest? No. Pardon me, just after roaches here folks, sorry, can I get you to move that wardrobe out of the way for me please? Whoa! there's the little bugger! Doh, now he's run under the wall and is teasing me from the other side of the town wall! I'll smash you good with my... wait, there's another one! Sorry gotta go!
Quite possibly the best (and most infuriating) quest in the game.