OMFG DK animations look awesome. Not to mention the abilities they have!!!

DK Blood Game play

DK Unholy Game play


I was totally thinking Blood all the way but damn that Death and Decay + Corpse explosion looks so much fun. I can't imagine they won't nerf the fear in D&D though, those mobs are getting feared ALOT.

Edit: More Videos

DK Blood Game play 2
DK Frost Game play
DK Starting zone *SPOILER ALERT* This video contains ALL DK quests in the starting zone from the time you login till the time you actually leave the area and join the Alliance or Horde, or otherwise are released from the Lich King's control.