Anonymous wrote:Mr. and Mrs Lastname. It's a sign of respect where I come from.
Same here (I'm from New York).
Eventually, they asked me to call them by their first names. But I didn't push it, because regardless of whether I think that level of formality is a little strange among family, I was not going to alienate them on something that didn't matter to me. You call people what they want to be called, within reason.
My DH called my parents Mr/Mrs the first time they met him, and they immediately asked that he call them by their first names.