When we get our next dog, an older dog would be the only dog I would consider.
There would be little training. And the energy level would be more on par with us. A puppy is cute and full of energy. An older dog is more relaxed.
We got our dog and he was about 6 years old. He was registered with the AKC but still had numerous birthdate years. He had health issues (partly because the previous owner never took him to a Vet) but you would never have known it. None seemed to affect him once he was treated (even Lyme disease).
I honestly think that he knew he was in a better place, which made him one happy dog. He seemed to enjoy hanging around with us and we couldn't have asked for a better dog to hang around with.