Relationship with grown children

I have an excellent relationship with our three daughters. Two are married and one is single. Two live in our area and the youngest lives out of state. I'm a firm believer that our kids need space and they deserve privacy. They are good decision makers as well. They were raised to respect me, along with my husband, and they show this respect on a daily basis. They have great careers and are happy. I only insisted, as they were growing up, they had to do two things: be happy and be educated. They accomplished both. THey are wonderful adults and don't know what I would do without them.