Lived in NZ for nearly 15 years now, I'll tell you about Auckland because that's where you'll most likely land in NZ and is probably the best place to "base" yourself in.
Auckland is the largest city that is built around roughly ~48-50 volcanoes...don't let that scare you though because they are all dormant/extinct, basically most of this island was shaped by volcanoes. I think one or two of them are expected to erupt in maybe the next 100,000 years. It's fun to visit them and play around inside them (yup, inside).
Whether/climate...very mild, at the hottest during summers it hits around ~25C (77F), during winters it can come as low as ~5-10c (40-50F). Due to being so close to the water the temperatures are very stable all year around. Oh but regarding Auckland be warned that it's REALLY random in terms of rain and sun. It can be a clear blue sky and start pouring down literally 1 hour later, and then clear blue sky again. People often joke that Auckland has all 4 seasons happening in 1 day
The people are VERY mixed in terms of ethnicity, literally coming from everywhere. If you asked me "what is most of the population comprised of" I wouldn't even be able to give you a straight answer. Most of Europe including Scotland, Ireland, UK...then there's South Africa, India, China, Korea, people from everywhere. Finally there's the Pacific Island population from Samoa, Tonga, Niue, Fiji, and NZ's own Maori. Oh but we don't get many Americans here, they're quite rare (we can tell right away because their accent is so different

). You'll see some ethnic groups more common (or less common) depending on the region/suburb you visit.
Generally we're a friendly/nice bunch...I guess, there's not much I can compare to.
Crime rates vary between areas, overall petty crime is quite low and serious stuff like murders are rare. Gun crime is non-existent (this country is the opposite of US in terms of gun-fanatics).
Food is...like the people, very mixed. As far as I know New Zealand doesn't really have it's "own" thing in terms of food/culture because it's just so mixed, I mean this country was DISCOVERED ~200 years ago so compared to other countries it barely has a history. You'll get whatever food you're after, it's all available. Indian and Chinese food especially is quite popular here.
Also there's pretty much no species of insect/reptile here that are harmful. This country has a rather weird thing caused by it's completely seperation and isolation from everywhere else, everything here developed with literally no predators.
It's not all roses n' honey mind you, this country has it's downsides (which country doesn't) and most of them are largely linked to the distance from all other countries and small population (~4.2 million). Most tech-related products and big brands cost significantly more here, around ~25-40% more than what they cost in USA - yes that is
after conversion. This is due to price-gouging over the large distances. The overall range and variety you'll find during shopping is less. Also internet is relatively expensive and slow compared to USA, this country's internet infrastructure really isn't anywhere near as good as the leading countries. You can get an 8mb-10mb/s connection with ~80-150gb monthly cap depending on ISP (range of ISP's is very small, only a few of them here), but if you're an online gamer then there's no helping the high latencies to US/foreign servers due to the distance. If the game you're playing doesn't have active/populated Australian servers then you'll have to deal with lag all the time.
Feel free to ask more questions
