Er, you know...the people who are doing it for the money...choose the best options to maximize the amount of money they can make...because doing otherwise would be dim.

If you want to produce cool looking animals, then get whatever you love to look at.

If you want to make money, then get primarily recessive gene animals that sell high, and do lots of research first.

If you want to do both, you're probably best off, and should take both factors into consideration.