Many people think that “a dog is a dog” and they all act the same. They bark at the Mail Man, run after squirrels, sit at your feet when you are watching TV, and love to play with your kids. Well, that is a good generalization of what to expect from most dogs, but not a predictor of what to expect.
Like people, all dogs are different. Even two dogs from the same litter can be completely different. Because of this, it is wrong to assume that if you had a specific breed in the past and wanted the exact same experience, it will unquestionably be accomplished by getting the same breed again.
In addition, it is important to train and interact with every dog based on their temperament, strengths, and weaknesses. Just like people, a dog can be assertive or passive, focused or wandering, inquisitive or placid, etc. Every dog has their own character traits and the best way to build a positive relationship with your dog is to understand and work off those character traits.
Robin and I have a great article that comes from living with (sometimes) eight dogs over the years. Each of them have been different and we needed to deal with each one individually. Please take a look at our article titled “Why Is My New Dog Not Like My Last Dog”.