What would the culture in a BNA that included the thirteen colonies along with Canada? Would it have a conflict between ideas of egalitarianism of the Americans and the aristocratic views of the British, and emerge like today's Britain, or remain in a quite classist society?
Also, would ethnic groups like the Native Americans have an influence, like the Iroquois or the Cherokee, such as still enduring to this day as their own cultures assimilated in BNA society? And what about emancipated slaves?
The POD for this would be that the ARW is avoided, something like late 1760s.