Dense cities are great for introverts and people who like "deep conversations". It all depends on the company you choose to keep and not where you are. With cities, you have more access to the people that you want to interact with and more opportunities for making new connections.

My experience is the opposite of what you describe. Suburban areas tend to be far more hurried and stressed (partly because they have to drive everywhere all the time). Moreover, there's a lack of "third places"-- social places to interact with people that aren't home or work.