At a European meetings of Heads of State there might be problems with other nations. The United kingdom isn't the only constitutional monarchy in the EU, and other nations have a separate president and political head (Ireland, France for example). We've even got a Grand Duchy in Europe (there's not many of those about these days).

So from a European point of view having the political leader of the country the same as the Head of State is a bit unusual. Perhaps it is you United Statesians who are a bit out of step! Bear in mind that if you need a non-political Head of State, I could do it for a while but I won't be free till the end of July!

Acting Grand Duke Les