The quen sign is SUPER useful.
Just put points into the sword tree so that you can hit multiple enemies with one swipe, deal more damage, and have more health. Getting Heliotrope from the magic tree is pretty cool, but you have to invest in quite a bit of "filler" on the way up to it.
Oh, and remember to play the game twice, taking the other fork in the road. It's a completely different experience and storyline.
so I've been playing the guild wars 2 beta weekend event... its pretty awesome