Agreed. My Mom is constantly complaining about how dark my picture is when she watches movies at my place. I have to keep telling her that sometimes, especially when the action is set at night, the picture is *supposed* to be dark. She is used to watching her TV at home with the brightness cranked all the way up. There is no such thing as "black" on her screen, just of lots of shades of gray.
Though, quality cables are never a bad thing either.