When I first started doing genealogy many, many years ago, I didn't use the word County/Province/Parrish etc so I would end up with something like John Doe was born in Dallas, Texas and died in Dallas, Texas. However, if the person was ACTUALLY born and died in Garland which is in the COUNTY of Dallas, Texas, then that kind of messes up my logic. So I started using County/Province/Parrish etc. I don't like to do the extra commas like in ',, New York' when I only know that it was New York. I don't ALWAYS spell out COUNTY though.
That being said, I don't generally add United States of America, but I DO put other countries. So I am thinking about starting to do that too.