I like to divide a working day into different jobs, just to keep from getting bogged down in some of the more boring bits, so I tend to alternate between the airport and the city. Wellington city involves a lot of autogen placement, which can be tedious, but it does start to show results quickly.
Work on the city at the moment is divided between autogen and adding to the 3D models. The Real NZ Wellington Intl and City included a handful of actual buildings, but I plan to increase this as much as I can in Real NZ NZWN.
Wellington is a lot different from what I'm used to here in Christchurch, houses are just crammed everywhere, and I hope to reproduce this, using the ability to localise the building textures to some extent.