My family loves dogs! Currently, we have two Border Collies -- Pancho and Lefty!
I love border collies. I've heard they are good at working and herding.
Both a plus and a minus -- sometimes they want to herd things that don't *want* to be herded! But they are sweethearts, for sure.
They were bred primarily for their intelligence and obedience. 
They are super-smart, for sure. Happily, obedience is a strong suit -- and deeply appreciated, considering some of the wild child dogs we've had before ;-)
Border Collie
The Border Collie is a working and herding dog breed developed in the Scottish borders for herding livestock, especially sheep. It was specifically bred for intelligence and obedience.
Considered highly intelligent, extremely energetic, acrobatic and athletic, they frequently compete with great success in sheepdog trials and dog sports. They are often cited as the most intelligent of all domestic dogs. Border Collies continue to be employed in their traditional work of herding livestock throughout the world.
Description.
In general, Border Collies are medium
collies became very fashionable. In the 1960s, the collie was much taller and bigger than it is today. Decades ago, collies were used for herding but they were replaced by Border Collies, it caused some collies to lose their herding instinct.
Temperament.
While often used as a working, herding dog, many are kept as family pets, as they are friendly and good with children. This type of dog is also friendly with other dogs and even non-canine pets.
Height, weight.