Exploring a place like Hong Kong takes time, and some parts one will never be done exploring.
These photo galleries and articles are updated from time to time, whenever I find something new. In brackets are the dates of the most recent update.

Galleries:
Graffiti (July 20)
License Plates (July 20)
Hong Kong Honeypot
Illegal Structures

Lists:
Best Free Views
Mong Kok Streetfood Jaunt
Public Drinking
Best Bus Lines