A hat tip to Donald McCaig for sending me a link to the above graph. Double click on the graphic to enlarge. This graphic comes from the book Knowledge Is Beautiful by David McCandless.
The data behind the graph is available here.
The dog in the top left corner that is "inexplicably overrated," is the English Bulldog. The small dog, almost on the middle line at the far right, is the Border Terrier.
Terriers and Spaniels got the best combined scores. In descending order of preference: The Border Terrier, the Cairn Terrier, the Welsh Springer Spaniel, the English Cocker Spaniel, and the Cocker Spaniel.