I want to start this post by saying that I actually really, really enjoy the PvP experience in Cyrodiil. I love the siege mechanics, and I have had a lot of fun trying to help take keeps.
But the most fun I have had in Cyrodiil has always been when I have been doing dungeons or trying to get Skyshards and my group comes upon a group of enemy players. The other night a group of us were trying to get through a gate to get a Skyshard, and ended up in a hour long fight with players who decided we shouldn't be able to get through their gate. It was random and very fun.
I think it would be a lot of fun to have one or more VR levels that had its own stories and quests that was also PvP. The added danger of never knowing if you are going to find an enemy player in the dungeon you are about to run would be a nice addition to the game, I think.
Thulsola
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Mercenaries of the Queen - because if you can't have fun while playing a game, what's the point?