I have a tendency to BE one of those "do-gooders", which is why
   I know it so well. Sometimes I ask questions or probe in places
   that people want left alone. It's hard when one is a
   service-oriented person but good to realize, "mind your own
   business" is sometimes a good piece of advice to keep. I still
   step over the line without realizing it much of the time, so it
   takes practice to figure out appropriate and inappropriate times
   to try to be Florence Nightinggale.