Wildstar is one of the few times I've seen humor done well in an MMO (or at least in this one's promo materials...haven't seen the actual game). With the obvious and delightful exception of Melissa Bianco's superb writing in CoH, MMO humor is almost invariably arch, poorly integrated, and generally cringeworthy. Developers create a mostly "serious business" world, then tack on fourth-wall-breaking attempts to be funny.
Wildstar starts with an appropriately cartoonish graphical look, establishes an irreverent, comical approach to the writing from the get-go, and clearly has writers who know what they're doing. Also, establishing a cartoonish look at the start actually makes that whole "gigantic sword" thing not suck. Words can scarce express how much I despised Titan Weapons in CoH, but here they don't seem so ridiculously out of place.
I like how they've set up the class system, too. If you're going to have a class system at all (and TSW shows very clearly it's not necessary), the ability to tweak each of the classes into a wide range of team roles and approaches is way, way better than rigid adherence to the Holy Trinity. CoH showed that the Trinity isn't a given, and Wildstar seems to be doing the same thing, albeit with a different approach. Ironically, while TSW's classless, level-less system mixes things up well in most situations, in the dungeons, the "3 DPS, 1 tank, 1 healer" setup is basically mandatory (and in fact certain specific powers at specific times are essentially required in Nightmare level dungeons).
All in all, I'm actually pretty intrigued by this game...which I will never play. Because NCSoft.
