The Daily Grind: What was your best open-world PvP experience?

As someone who usually stands on the outside of the whole PvP scene, I'm often curious about the appeal and goings-on of fighting endlessly against other human opponents, especially in MMOs. People seem to talk highly of open world battles and epic moments, although my experience has been limited to being corpse camped on a World of Warcraft server and taking part in many confusic and hectic keep battles in Warhammer Online.

So sate my curiosity today and tell me a time when you had your best open-world PvP experience. What happened and why was that such a treasured memory?

Every morning, the Massively bloggers probe the minds of their readers with deep, thought-provoking questions about that most serious of topics: massively online gaming. We crave your opinions, so grab your caffeinated beverage of choice and chime in on today's Daily Grind!