I haven't gotten it /yet/, I'm waiting until after I get sick of Borderlands 2 before I invest my time in it.
As someone who doesn't like MMO's, I'm pretty excited for Guild Wars 2. Unlike conventional MMO's, it's more focused around combat and actual battles, and not so much on grinding and pay-to-play bullshit. It's not like WoW where you're going to spend hours cutting down trees just to get some little income, nor are the battles so boring that all you're going to be doing is clicking some random character and casting spells.
10 minutes of Guild Wars 2 combatThat's probably what I like about it. There's a lot of maneuverability that you just don't get in a traditional MMO, and combat is very group-oriented, so lone wolfing isn't as beneficial as running around with a friend or two.