When looking for a good family pet we have the following recommendation: "Don't focus on age, color or gender - focus on personality and temperament".
The reason for this is simple: Many people look for puppies and rule out an older dog. Young pups can sometimes be a handfull, and will need constant training to become socialized and obedient. While an older dog has already developed their personality and temperament; they are however socialized, more settled and calm, and adapt more readily to new situations.