I have to agree with Carang about HK's lack of forward warning of turn off signs.
When we were in France I was so happy to have 3km warning before on coming road turn offs, and the many picnic rest area's dotted along all national autoroutes..... Made driving a joy.
If you have a good memory for reading maps before you embark on where exactly it is you are going to drive in HK, driving is actually very simple, but takes awhile to know your way around. Causeway bay is the worst in my opinion with its myriad of one way streets and HK's weird fear of no right turns ??? I don't think I have ever driven in any other city that refuses to allow you to turn right, at major intersections, as much as this city.
Apart from that, you get used to it and it becomes easier as you develop locational memory and confidence.
We live in the Gold Coast area, ( absolutely love it ) and find that because we have reduced our overheads in many other area's, that the average expat tends to blow their dough on, we can easily afford the luxury of owning/enjoying a car. I'd rather spend some of our expendable income on our car, than wasting it on rent/bars/boozing etc,things that don't particularly interest me.
Having a car, has allowed us a lot more geographic freedom, and makes visiting friends in area's an hour by car away, much easier to get to, than if we were to use public transport which just doubles, or triples the journey time, making it a chore, instead of just jumping in the car and driving to Shek O for the day ( for example ), in a relaxed fashion.
As WTBHOTIA expressed, the car is only as expensive as you make it, you can buy a Toyota Hybrid which can travel 100km's at a cost of $52.45hkd, which is much cheaper than using the bus, if two adults drove...
Just an example, dispelling the myth that cars are expensive, some might be, most smaller engine capacity Japanese cars are not. .....