Most of the behavioural traits that we see in our Labradors today come from the way they were bred and trained. For instance, given that for centuries, the main job assigned to the Lab dog was to retrieve delicate prey, they tend to still be a little mouthier today. Our labs are still instinctually excellent at retrieving and with the right training, will happily fetch items for you at home, as well.
Since they worked so closely with their hunters, Labs formed a deep bond with their humans, and are known for their highly sociable and people-pleasing nature, even today. They would travel long distances with their hunting parties and are thus blessed with high stamina and drive. They are also known to have a good recall, as it was crucial for the hunters to have them come back when called, no matter how far they would be in the fields.