The best breeds for first-time owners are generally considered to be breeds that are known for their friendly and easy-going nature, as well as their trainability. Some popular choices for first-time owners include Labrador Retrievers, Golden Retrievers, Beagles, Poodles, Cavalier King Charles Spaniels, and French Bulldogs. These breeds are typically good with families, easy to train, and have stable temperaments, making them great choices for new dog owners.