Favorite thing: Auckland is built on a narrow isthmus so is surrounded by water. As a consequence water sports are very popular here given the easy access to lots of great places. A view back to Auckland city from tamaki drive shows the expanse of water with lots of boats.
Tamaki Drive is the main road between the Auckland downtown area and the eastern beach suburbs. Along Tamaki drive you can get great views of the CBD, the Waitemata Harbour, Rangitoto Island, and Devonport.
This photo is taken from outside Kelly Tarlton's Underwater World. Another good place to go for a view is Bastion Point. At Mission Bay, you can stop for a coffee (if you can find parking and you're feeling pretentious enough to join the "see and be seen" crowd).