It's no surprise that the Golden Retriever is one of the top ten most popular dogs in the U.S. It's all good with the Golden: he's highly intelligent, sociable, beautiful, and loyal. He's also lively. The Golden is slow to mature and retains the silly, playful personality of a puppy until three to four years of age, which can be both delightful and annoying. Many keep their puppyish traits into old age (https://dogtime.com).