Personally, I look forward to having children in the future.
In terms of richer countries and birthrates, that is sort of how it works. In third world countries, there are higher child/infancy death rates, so families often have more children. Children are also considered assets as they can help work for the family and take care of them.
In the more advanced countries children are not an asset but a hinderance. Most would rather continue with their careers and often the cost of sending a child to college is quite expensive. The most obvious example of this would be Japan. Many people do not want to start a family as they are not interested in slowing down their professional or social life. There is also the matters of the extremely competitive education system which often requires quite an investment for a child to make it into the better schools. This among other issues has led to a birthrate so low it is below the death rate, which is one of the most serious issues the country faces.