Rangers and Druids
My favorite two classes in MMOs have always been Rangers and Druids. Something about harnessing the power inherent in nature and communing with everything around us really appeals to me. Whenever I go back to WoW I always use my Druid as my main. Not to mention the magic slinging, precise marksmanship, and dual wielding handled by Rangers. Rangers are bad-ass and they are always my first choice of class, so this video from Guild Wars 2 made me extremely happy today.
I was interested before, but now I'm excited.