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 ;-)
Many people say they are the smartest of all domestic dogs!
We also love boxers -- do you have dogs?
Boxer (dog)
The Boxer is a medium-sized, short-haired breed of dog, developed in Germany. The coat is smooth and tight-fitting; colors are fawn brindled or white, with or without white markings. Boxers are brachycephalic (they have broad, short skulls), have a square muzzle, mandibular prognathism (an underbite), very strong jaws, and a powerful bite ideal for hanging on to large prey. The Boxer was bred from the Old English Bulldog and the now extinct Bullenbeisser
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.