Both have advantages and disadvantages. Usually, it's just an individual choice. Fortney said that big dogs require more care. However, they are sturdy animals, they are great companions and they don't always want to be in the owner's lap or bed. They are close companions, which means they like to be in laps and beds.
Some people love that.
Also, they are known as good watch dogs. They usually bark when someone comes to the door or the phone rings, but they don't pose a threat. When looking for a dog for the elderly, Fortney mentioned some characteristics to be aware of. Look for a pet that is calm and has a tolerant demeanor. You're asking for a problem if you have a hyperactive dog in the house.