Most show breeders depend on their pet sales to support their hobby and even to make money, but most of them would not like to think of themselves as pet breeders and are, often quite rightly, very suspicious of anyone who only breeds pets. No-one appears to be trying specifically to breed a dog which makes an ideal family pet. A dog bite to a child's face can cause dreadful damage. My first and most important criterion would the absence of aggression - whether motivated by dominance, territoriality or fear. The risk of aggressive behaviour can be best minimised by rigorously selecting against any sign of aggression in the breeding parents.
Veterinary bills can be awesome when dogs have chronic or recurrent health problems.
My ideal dog would not be inbred or line bred because inbreeding leads to immune system, fertility and mental health problems. My dog would be similar in size and shape to a Kelpie or Dingo - dogs selected by nature for survival not by man for appearance. My ideal dog would be medium sized - again not extreme. Extremely large dogs are prone to bone defects, a short life span and heat intolerance. Extremely small dogs have mouth problems and delicate bones and joints.