The Boston Terrier personality varies from individual to individual. Some are rowdy and sassy, others more mellow and subdued, while still others will do anything for a laugh. All Boston Terriers, however, love people, love activity and love lots of attention. They are especially good dogs for elderly people, as they tend to focus most of their attention to one person, and tune in to that person's emotions. A Boston knows when his person is sad, happy, lonely or angry and can adjust his own behavior accordingly.