Here is my attempt, you might need to click on it and zoom in to make out the detail...sorry. Special apologies to Berowra people, I meant to include you in the Northern Suburbs bit.
Its an interesting exercise, and while attempting it I made the following observations:
1. Which criteria do you use? Economic? physical? or just "the vibe"? I kinda went for the third, which in reality is a mix of lots of other factors. But some areas do carry a widely recognised identity, eg "the Shire" and "the Upper North Shore". What makes for such identities?
2. Following on I noticed that other areas really didn't lend themselves to a more obvious label. What about that bit just south of the CBD which isn't really Inner West but isn't quite St George either? Inner South?
3. What about those bits which seems to get lots of negative press? The strip of land stretching between Bankstown and Auburn for example. This is often labeled as Muslim territory, but are Muslims really the dominant group? The vast multiculturalism of this area is perhaps the biggest identifying factor.
4. Notice how the more west you get the bigger the boroughs? This could be for a number of reasons: People in the more established areas are more concerned to identify themselves more narrowly therefore they have established their identity accordingly; The newer areas are yet to develop identities that have Sydney-wide currency; My scheme reveals my own ignorance and biases.
5. I wonder whether you could draw up a typical character profile of people living in these areas. As one (female) friend said, "You can tell a woman from XXX because of the massive amounts of gold jewelry and the massive massive hair."
6. It would be interesting to compare the comparable regions. Eg, Upper North Shore vs Hills. Both are affluent, but is it a different kind of affluence? Old Money vs New Money? What about Lower North Shore and the Eastern Suburbs?
What do people think? Is my attempt on the money?