Friendly is a important trait because the dogs will be friendly to some stranger or unknown when they meet someone. Adaptable is important trait because in case something happens and they are stuck in an unknown place they will adapt easily and wont face much problem.
Playful is also an important trait because when you play with them and have fun with them it will create a special kind of bond with you. Affectionate is also an important trait because if the dog is affectionate he is caring and helpful and thats great and useful.
Energetic is a great trait to have because it can help during a race and help you win.Also trainable is a good trait because training is easier and you have more control over them to help win a race .