GW2 looks fantastic so far. I think arenanet is the only company trying to make their own MMO now instead of copying WoW. I've been keeping up with GW2 info and the new quest system and combat systems all sound great. The combat definitely sounds like it will be less automatic and require more involvement on the players part, and the questing sounds way more friendly to both groups and solo people, as well as sounding way more interesting than the quest systems we have now where nothing you do impacts the world you're playing in.
Then of course my fav thing about GW is the lack of level/gear grinding. According to arenanet it's going to be easy to achieve good gear and max level in GW2, so that leaves more of the game to play at the higher levels with good gear instead of continuously trying to get better gear. I think this is a great idea because they can design a lot of dungeons to play through for fun and challenge instead of making a tiered raiding system that focuses 99% around getting new gear to get to the next level.
So far the class videos look great too, I've noticed the have 8 silhouettes in the main screen for classes and so far the 3 classes they have revealed are classic classes. I'm personally hoping all 8 classes stay the same, but mostly I just want them to put ritualists into GW2 because they're one of my fav classes from any MMO I've played. All of the skills are more user controlled though it seems, like active blocking and being able to charge your attacks to different levels. This is what I've been looking for in a MMO, a more in depth combat system that isn't button mash happy like WoW.