The two excellent parent breeds that produce the Golden Collie seem to be very well-paired. Both dogs come from Scotland and were carefully managed from the start. The Golden Retriever was not just the first dog to win the American Kennel Club's Obedience Champion title but did so the first three years once it was established. Likewise, the Border Collie has been revered by poets and royalty alike — such as Robert Burns and Queen Victoria — so you are sure to have a beautiful, brilliant and well-behaved hybrid dog.
With a very intelligent dog comes a lot of responsibility to train, socialize and exercise her starting at an early age. It may seem like hard work at first, but with the Gollie, the results will come quickly and they will be wonderful! Mating the two purebreds tends to result in the nearly guaranteed characteristics of high intelligence, calm demeanor and desire to have a distinct purpose (and not just a job or occasional tasks) that your Golden Collie will inherit.
The copacetic attitude of your Golden Collie should come as no surprise once you understand how eager and able she is to learn new tricks and quickly fit into a working role. Once she's properly trained to not get excited at every opportunity (such as a knock at the door, etc.), you'll find that her "stand-by" mode after a few hours of the daily play and exercise routine (or her work, if she has a "job") is good for both of you.
Golden Collies are very active dogs. They come from herding breeds that are accustomed to long days requiring careful vigilance and a sharp mind. They will need to burn a lot of energy daily, and they need to not become bored. Like any active dog, neglecting their exercise can lead to rather bad if not destructive behavior. Be sure to keep lots of agility toys and time set aside to comfortably enjoy play time and exercise with your Gollie!