I've seen Avatar in 2D and then later 3D .. and I took this away from it... 3D look kick ass if .. and only if.. your focal point is on the same part of the screen that the director intended to be the focal point.... if you try to wander off and look at some other part of the picture.. things start to get a little wonky... (holy shit, wonky was in the spellchecker!)
I too am rather annoyed at the "everything has to be 3D" shit... I see a cool trailer.. then .. of course... "In 3D!" ... but of course it is... /sigh
Maybe it's because the local theater doesn't play 3D .. and I have to travel 45 minutes to the nearest 3D movie...
meh, I say... MEH!