Great interview! Of all the various settings for the current live games, Guild Wars is among my absolute favorites. It also notably has my favorite soundtrack of any online game I've played, but that's besides the point.
I'm really looking forward to GW2 though. There were a lot of really great, subtle things done with story in the original that brought a lot of depth to the world that went above and beyond what the main storyline offered. Even simple things like when people first started traveling to the Underworld there were long discussions about the ghost of Gwen's mom - then years later you can travel there with Gwen in your party and reunite them. Or a favorite of mine is what Reyna says to you after you finish the first campaign - totally hilarious (but I won't spoil it for anyone who's not gotten there yet)
I started playing again recently, specifically because I always enjoy the holiday events, but found myself spending a good bit of time in Tyria otherwise even with all the other major releases this season. I've also been oddly drawn to making anaglyph images lately so to bring the two together, I'll leave you with an anaglyph of an Elementalist!