1. That you will be mistaken for a Brit.
You’ve spent your entire travelling life explaining to people that you’re not Australian, that New Zealand and Australia are different countries, and that yes, the New Zealand and Australian accents are quite distinct.
Forget all that.
In the US, everyone will think you’re British (Australians don’t get off the hook here either — Americans will think you’re British, too). You will have to memorize a new set of lines to play on repeat: no, New Zealand isn’t anywhere near the UK. No, a New Zealand accent is not even remotely like a British accent. Yes, British people probably do like to eat bagels and cream cheese, but you recommend asking a British person…