WHen I bought my first laabrador, he breeder had only 3 chocolates ( and a litter of 12 chocolates) out of some 50 dogs--she said the chocolates had temperment problems because they were , at that time, only recently accepted into the AKA as a new color for labs. Everyone bred everything without a care for temperment to fill the growing want for that color. SHe was picky. My dog had a great temperament--he was a black with choco mother.
We all enjoy the beauty of creatures, and utility. Many breeds developed out of utility, and then were brought to the next level, aesthetics, by the diligent breeders. Takes time and careful breeding. Generations and decades.