I think it is more about temperament. I have three. Mom and her two pups that are now 7 months old. The female Pinky and her mom get into it more than mom and son Princeton. The puppies play very well together. They all have so much fun together. Here is a puppy test for temperament. It is an extensive test for working dogs but I think it may help you decide if you want a more submissive personality.
http://www.workingdogs.com/testing_volhard.htm
Good luck in your search.