When I got my rescue dog at Battersea, he became a bit of a talking point on our daily walks and I got lots of interesting and useful tips and information from other dog owners. Talking about temperament, one man said that black dogs often get into fights as other dogs find it hard to read their expressions. I don't know how true it is, as I've had two golden retrievers who always started the fights, and my new little black mongrel is the friendliest dog alive! Having said that, a couple of dogs have started a tussle with him.
Also, whenever I take a photo of him, it is very hard to make out his features in the picture.