Mal Fletcher comments on her reign.

For someone in her position, the Queen has been unusually accessible to media outlets. Her first Christmas radio address was broadcast in 1952. Her first televised Christmas speech came in 1957.

That was the year of my birth and from that time on, these addresses, though sometimes a little stiff in their presentation, were a staple part of my childhood Christmases in Australia. As they were for millions of others living in Commonwealth countries.

This December 25, my first grandchild will likely also hear the Queen speak to what she considers to be her family of nations.

There have been times when media interest in her immediate family has proven intrusive and perhaps, though she is normally too skilfully diplomatic to say so, offensive.

Yet her actions and demeanour suggest that she has accepted the public's interest in her, albeit on her terms. She has, thankfully, carefully avoided becoming a celebrity in the way that some contemporary monarchs have done.

As a result, her measured accessibility has not destroyed the mystique that seems to be a necessary part of longevity in such a role.

From time to time, Elizabeth II has also granted her warrant for the filming of television specials. She has even embraced new media, via a Facebook site.

Yes, it is run by courtiers and you can't have a social media conversation with the woman herself, but the principle of engagement is important in itself.

Of all the leaders of the modern world, she has perhaps managed her public appearances the most artfully. She has not revealed too much, yet has allowed her public to feel that they know her at least passably well.

This careful management of her public profile and her fierce protection of private time is a key reason for her continued success.

One prominent historian recently suggested that Elizabeth II has not contributed much of historical importance, given her unwillingness to throw herself into debates or speak out on issues.

Yet, say those who've worked with her, this refusal to speak publicly should not be mistaken for a lack of interest or thoughtfulness.

Her various Prime Ministers have often attested to her keen mind and sharp wit - and her absolute grasp of matters of state.

It's impossible to know just how much the Queen really understands the daily lives and experiences of the people she seeks to serve.