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To reply to some suggestions from others:
As for appointment of the Head of Commonwealth position or rotation amongst member heads of state/government. No, simply no. First off don’t make the position political, that would be horrible. As for appointment of those who have served the C’wealth well, they should become Secretary-General for example.

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“Paratus”: Er, the position of Head of the Commonwealth is not a hereditary one. The Queen was supported to become Head of the Commonwealth by it’s member states back when she ascended the Thrones of the UK, Canada, Australia, etc. However, whoever succeeds her as Monarch will be the one who will almost certainly become Head of the Commonwealth.

To many of us the commonwealth is more to do with shared values and not the symbol of the Royals of England. We do not wish to turn the commonwealth into a club of the previleged and the underpreviledged. We have alot to share instead of a monarch from a specific Race.
Thank you

First, while the Monarchy continues, its retention of the position of Head of the Commonwealth seems to favourable, due mostly to the absense of doubt created by this inheritance.

The second case is the potential for the Monarchy to come to an end, with the establishment of a British Republic as an example. In this case I believe the Commonwealth would survive, because it is based on more than a shared Monarch. It is based upon a shared heritage that the Monarch embodies.

This of course does not discount the need for continuity from Constitutional Monarchy. As has been stated elsewhere, politicisation of this role would be unfortunate, possibly even fracturing the fabric of the organisation.

As such the establishment of an appointed Head of the Commonwealth who serves an extended term, of say 10 years, could continue this tradition of service and tireless promotion.

When considering that this need for continuity of heritage and tireless service will embody this long term appointment, there would be few names that would come higher on the list of candidates than the Princes of Wales. Few have as truly outstanding a resume on promotion of Human Rights issues and Humanitarian Missions as even Prince William, nevermind the virtual lifetime of service Prince Charles has given.

Following the end of this first HotC term, not only would continuity have been given its best chance of being maintained through the appointment of a House of Windsor successor, but precedence will have been set for the appointment of individuals of the utmost international standing and dedication to self-sacrificing service to people.

This could allow the HotC title to be awarded in future to other such figures of the highest esteem, Commonwealth subjects who have spent their lives in the service of people and the upholding of Commonwealth values.

As such the title could come to be not just a most solemn service to the Commonwealth, but also its highest reward for a lifetime of dedicated self sacrifice.

The princes many years of campaigning for greater understanding and dialogue, particularly between different faiths, and his championing of ecological causes, makes him an ideal candiate for the position. If he wasn’t going to inherit the post, he would be the ideal candidate for appointment.