For 3D, I like my passive 3D LG 47LW5600 LCD over the active 3D Samsung PN50C675 Plasma I replaced with it. I find passive glasses far more comfortable (less headache inducing for me) and good for crowds(bought a huge pack of glasses for cheap). But I found the plasma nicer for 2D viewing.
These days, I pretty much use a laser/led projector for viewing on a huge screen and only breakout the 3D TV for just those titles. And it’s a hit or miss if it’s better to watch 3D at 47″ or 2D at 120″. If I redid my setup now, I’d problem look into a 3D compatible projector so I could get the best of both.