We've had four cats. None of them did we buy for ourselves. Two black and whites we adopted when their owners, our friends, moved to a small urban house. Later, we took a tabby off a friend's hands because she had a small baby who needed all their attention.
But the last and best, a black kitten who stayed with us for thirteen years, we found miaowing up a tree - whether lost or abandoned, we never discovered. We made lots of inquiries before we decided that he was ours.
I always think black cats are the friendliest of all the colours - not just ours, but black cats in the street etc always seem very friendly.