I'd argue that for most, living in a suburb is in fact the worst of both worlds. You are neither rural nor city. You have none of the benefits and many of the drawbacks.
For me my decision to live in the city is one of safety (driving cars is dangerous) and time. When I lived in the burbs I spent something like 30-40 full days a year sitting in my car. That's 10% of each year in my car. That's just not a trade I'm willing to make anymore.