I've never really bought into the animosity (good-humoured or otherwise) between Australians and New Zealanders. I mean, I just don't get it. When I was in NZ, it seemed at every opportunity, my hosts were jumping to compare things to Australia or make some snarky comment about Australians. As if they think we spend all our time over here thinking we are superior or comparing ourselves to you, or something.
I'd make "US vs. Canada" comparisons, but it's not really the same: New Zealand and Australia are far more similar than the US and Canada. (I've lived in both - the accents might be similar but the people and ideologies are very different). NZ is the only foreign country I've ever been in (I've been to 20+ countries) that didn't "feel" like a foreign country at all. Wandering around a NZ city feels just like Australia ... same brand names/company names, same 'look and feel' in urban design, hell, even the traffic signals at crossings make that same "slow beep for stop, chirp followed by fast beeping for walk" that I associate with home...
But the average Aussie doesn't really think about NZ in the same was as many Kiwis seem to regard Australia. I never thought about NZ to a huge extent before I went there ... every now and again, sure, but not to the extent NZ seems to be obsessed with comparisons to Oz. I always just thought of NZ as our very close brothers across the Tasman - the other half of the ANZACs, the only other country to which we extend special reciprocal rights (living here without a visa, access to each others' healthcare systems, etc.) We don't extend any of those courtesies to anyone else, even the Brits and Americans.
So I was a bit shocked at the fact that a lot (not all, but a lot) of New Zealanders seem to hate the place! Well maybe not hate, but their attitude definitely went beyond a bit of a good-natured ribbing. Don't get me wrong, it wasn't universal, but it was a noticeable theme in my time there (which was on a work assignment for a month, in and around Wellington, NOT a holiday). OTOH I've never heard Aussies say a bad word about NZ (outside of the context of sport, at least).
Anyway, it's no big deal, and maybe the sense of humour over there is a little different and I'm just a bad judge of what's 'serious' or not. But it certainly caught me off guard, and left a bit of a bitter taste. I always saw NZ as equal and close friends and now ... I dunno, I get the impression that the feelings don't go both ways. A bit of an eye opener. And honestly, I'm not sure what we've done in the past to deserve it.
Having said that, NZ is a beautiful place and I'll still visit again one day (for a proper holiday, not work). Who knows, might even retire there (hey, I'm a Canberran so I prefer the cooler weather to the blazing heat than infests most of the rest of Australia!).