I too am mostly pleased with my 65" LG. I really don't like the 2D to 3D conversion, but overall picture is pretty superb. I am really fortunate in that I don't have light bleed around the edges, even when viewing a dark film with the lights off. There is some minor clouding, but you really need to look for it in order to find it.
When gaming, I can certainly tell there is a hit in resolution when playing in 3D. It isn't devastating by any means, but it is apparent, perhaps more so on a screen this large. Gears of War 3 is a big offender.
Finally, I will say that it really took some time to get the colors right. There seemed to be a big red push, dialing that out was a nightly process and I'm still not certain I am where I want to be with it.