@McTag,
McTag wrote:
In recent years it has been my custom on this day to ask Americans, on balance, whether they consider it an advantage or otherwise to be independent of this country.
I don't think I've had a polite reply yet.
I believe you are being a bit unfair. I think my earlier reply was quite polite and in keeping with the question.
I believe the essential answer is that very few Americans even think about the question anymore. While our history is short by your standards, it has been fairly replete with significant events, the Civil War and the mass immigrations of the 1860 - 1920 period, perhaps the most significant. Both fundamentally altered our historical trajectory from what might have been had we followed the examples of (say) Canada and/or Austrailia.
Perhaps even more significant is the fact that America was settled by (mostly) Englishmen who were bent on escaping some element of British rule or society, some religious, others economic (Georgia was settled largely by British debtors). With that in mind it is highly unlikely their progeny would settle for increasingly British and increasingly remote rule. They had been left to themselves for ~ 150 years, and resisted mightily when, after the Seven Year's War, Britain attempted to integrate them into the colonial order as a matter of fact as opposed to the mere theory of it, which had persisted until then.
The American colonies thought of themselves as self-governing right from the start, and rebelled once George III attempted to make it a fact.
In short we were never really a part of the British Empire.