Everything...seriously. PQ is incredible, 3D is fantastic and viewable from all angles.
Nothing. Well, maybe the fact that 3D glasses are so expensive, but I didn't buy this TV for the 3D (it's been a glorious incident to the purchase though).
I'm serious, this TV is gorgeous. I've had it for almost 8 months now and it has been an absolute treat to my Blu-ray viewing and PS3 game playing.
Far and away the greatest TV I've ever seen next to a Kuro (obviously). This is also the best money I've ever spent on a television, and the second best electronics purchase I've ever made (behind a PS3). If you are in the market for a new TV, and are looking in this price range, get it (or the newer VT30 models), you won't be disappointed. You'll be blown away.