Currently, driving for domestic trips. The petrol AKL-WLG is roughly the same as a OW ticket bought on a date/time I'd like to fly. As I am still relatively new to NZ, the scenery is novel. My car is sizeable and comfortable, the driving conditions (roads, traffic, etc) are ok, and I can avoid the annoyance that is short haul Y: 1 hour to AKL, 1 hour waiting, 1 hour flight in a tight space with minimal service (NZ$150), cab/bus to cbd.
Int'l trips necessitate flying. It's a long swim, and the idea of a cruise doesn't appeal to me.