I just kind of think having a car is like a piano, but with extra taxes - impossible to ship across borders/oceans/whathaveyou, and I need to have space to store it somewhere.
That being said, when I did live in rural areas, it wasn't very useful to have one. In the US, any place that was sort of cool was still 150 miles away and in the UK taking the car to go into the city was about as expensive as taking a taxi (and a lot more trouble) due to the congestion charge - and taxis in the UK are expensive.
So I just prefer to be in areas with either public transport of some sort (that I find acceptable) or taxis I can actually afford. Or both. Dubai is awesome...
I also prefer to be able to walk 5 miles somewhere if I feel like it. That's the problem with this place...