There are so many things that you can do while you are staying in Hong Kong.
Large shopping malls, great food, tall architectural buildings.
However, if you are not into those things and love nature, I highly recommend you to stay on Cheoung Chai island which takes 1 hours by ferry.
The island has very nice and friendly locals, awesome seafood, beach, markets and street food.
Check out my portfolio to get some ideas about Hong Kong and Macau!