As surgeons, we need to see patients and also operate, and therefore with more limited time than internists and other non-surgeons, tend to be very efficient at getting things done. Most urologists like to operate in the mornings and see patients in the afternoon. How late we leave at the end of the day is a very individual thing and is probably no different than in any other field. Although it is denied by many, each field in medicine certainly has a caracature of the average practitioner. Whether or not a career is compatible with a family depends more on the family than the career.
Priorities are priorities and they arise from within individuals.
It may be true, however, that personal control over your life may be limited longer in a field like urology than family practice, as the training period is longer. Certainly, urologists are fairly creative and open-minded creatures who like families as much as new technologies and gadgets and scopes and the like. Within this field, you can choose the path you choose. Volunteer work is not that important but does show evidence of interest and motivation. Extracurricular activities in general are important because they contribute to the development of the individual as a person.