The Cavalier King Charles' popularity is what it is today much thanks to its joyful, sweet, and loving personality. They have very calm and easy-going demeanors and adore their family. They are known to quickly form bonds with those they love and do excellent in families that have children and other pets in the home. They almost never show signs of aggression and are always anxiously waiting for you to get home. This is one of those breeds that will steal your heart in no time at all.