Like the title says, what is your favorite DE so far? Mine would most definitely have to be the ice dragon group event/raid in the lvl 70-80 area right up above the Norn city. It really reminded me of WoW's raids with a GW2 style and twist. There was a lot of strategy that had to go into it, a lot of trial and error until we figured out exactly what we had to do. In the second phase you have to destroy these ice shards that pop up the ground so it doesn't kill the asura golems that are armed with explosives (they stun the boss long enough for you to be able to dps him), at the same time you have to kite the mini bosses that spawn and eventually kill them, because you will be overrun with different veteran mobs. Theres also a bunch of other ice mobs around that have to be killed on the ledge so they don't kill the golems.
It requires much more than just 10 people, so that was pretty cool.
It was a very fun fight, just awesome. Some special weapons like grenade launchers and flame throwers you can use to help you out as well. I look forward to the DE's in Orr =D