I don't want to lose 1/4 of the picture just so it'll fit neatly on my screen without black bars. The worst is when the first HD release of a program mastered on film is in 16:9, so we never get the full picture in HD and have to choose between higher resolution and seeing the whole damn picture
So glad that the Avatar: The Last Airbender blu rays were released in the original 4:3 aspect ratio.