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!