Shorter "battlegrounds".
Nothing pisses me off more than having to sit through a longass battleground in WoW when the other people are stomping us.
Dat combat.. Seriously, that's what I like the most. And it all feels so fresh, easy going and the world is so beautiful. And Arenanet also doesn't ignore PvP which is something I really like.
I LOVE JUMPING PUZZLES. There I said it OMG I love jumping Puzzles I did 4 diffrent jumping puzzles. 2 were easy 2 were alittle harder those were really fun. I heard the later ones get really tough which is awesome.
Dynamic Events its another big one for me, not competing for quests objectives really made you feel like you wanted to be around the community. No more running off to be by myself so I can farm troll necklaces hoping someone doesnt tag my mob first or getting frustrated that your friend isnt having as much luck as you and is taking forever getting is 40/40 Gazel meat....
World Events 1 word EPIC!!!!!
The Combat Some wont believe me when I say this but its 100% true within 6 yrs of WoW and 5 yrs of Guildwars 1 and half a dozen other MMO's in Bettewen Ive never had as much fun fighting mobs that whole time combined as I did in that 30+ hrs in the GW2 Beta weekend. And not only that but because of the combat style and its challenging nature I surprized not only myself but my friends in deciding after 7 yrs of MMO's to finally wanna roll a Melee Class. I hated Melee classes in every game I played they were boring, you swing they swing and RNG decides if you live or die. in Guildwars 2 if the enemie starts swinging you better skill up and start dodge or you die, no RNG in this game its all skill... Warrior Great Sword / Rifle is Amazing in GW2.