Time will tell, but personally I think De Gaulle got it right in 1963 with his “veto” speech (translation):
"Britain is insular, maritime, related through her trade, her markets, her supply routes to countries very far away. She pursues essentially industrial and commercial activities, and only slightly agricultural ones. She has, in all her doings, very marked and very original habits and traditions. In short, Britain’s nature, Britain’s structure, Britain’s very situation differs profoundly from those of the continentals."
And so did the Australian Prime Minister Robert Menzies in the same year, if De Gaulle had let us in:
"Australia is being asked to sign a blank cheque."