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
I watched Twin Peaks a while back, and I was so happy that the HD releases are in 4:3. When given the choice between HD and original aspect ratio, I nearly always choose original aspect ratio.