Current affairs / news
Kiwi culture, including music (all kinds) and the arts.
The commercial stations generally are all ads, peurile "morning crews" and the same music you hear everywhere.....or they are "alternative" - which can be good, if unpredictable - or Talkback (Radio Live and ZB) where people who clearly know close to nothing about almost everything voice their strong opinions.
If you want a high signal and low noise ration, you can stream Radio New Zealand from www.radionz.co.nz though they may block access from overseas IP addresses due to content licensing concerns.
Alternatively, RNZ is also accessed via the "Wunder Radio" app on iPhone and Android.