It has been shown that out of all dog breeds, it is the Labrador Retriever that is most likely to be obese. In a 2016 published study it was shown that out of 310 Labradors, most were missing all or parts of the POMC gene. This gene plays a part in appetite regulation as well as indication of the amount of one's stored fat. The study concluded that the absence of that gene had a significant impact on Labrador weight and appetite. The POMC gene mutation is present in only one other breed – the Flat-Coated Retriever.
The AKC describes the Labrador's temperament as a kind, pleasant, outgoing and tractable nature. Labradors' sense of smell allows them to home in on almost any scent and follow the path of its origin. They generally stay on the scent until they find it. Navies, military forces and police forces use them as detection dogs to track down smugglers, thieves, terrorists and black marketers. They are known to have a very soft feel to the mouth, as a result of being bred to retrieve game such as waterfowl. They are prone to chewing objects (though they can be trained to abandon this behaviour).
Some dogs are simply easier than others: they take to training better and are fairly easygoing. They're also resilient enough to bounce back from your mistakes or inconsistencies. Dogs who are highly sensitive, independent thinking, or assertive may be harder for a first-time owner to manage. You'll get your best match if you take your dog-owning experience into account as you choose your new pooch.