The document lists the 10 most affectionate dog breeds in the world: 1. Labrador Retriever - Loyal, obedient, social, intelligent and the most affectionate. 2. Chihuahua - Despite its small size, it has a great personality and is tender, intelligent, and very affectionate. 3. Boxer - A large breed that may scare some due to its appearance but is affectionate and playful.