Hi, we are going to send out our save the dates in a few days, and after getting 2 lists of who to invite--one from each of my parents--I'm seeing that they both addressed people in different ways. My dad would write something like "John and Sally Smith" while my mom would write "Mr. and Mrs. John Smith." Which is preferred? Does it matter? Yikes, I can't believe I'm worrying about something like this! Anyway, I'd appreciate your help. Thanks!