Consider the Personality (Temperament):
If you want a quiet, calm dog, then you shouldn't get a terrier. Terriers can make wonderful pets, but they tend to be vocal and they have their own opinions about most things. That is just their nature and they can't help it. If you want an extremely mild mannered dog that requires little or no training, then you shouldn't get a Collie just because you adored Lassie when you were a child. In a nutshell, it's not fair or reasonable to expect a dog to be something that he's not!

Consider the Adult Dog (NOT the puppy!):
If you want a cuddly lap dog, you certainly shouldn't get a Giant Schnauzer, Saint Bernard, or German Shepherd. Even though all of these dogs are are small, adorable and cuddly when they are puppies, they quickly grow up to be active, spirited large dogs and they take up the entire sofa by themselves! Read the breed descriptions of all of the dogs you are considering and pay special attention to the breed standard for adult size.

Consider the Grooming:
If you don't have the time to spend brushing and trimming your dog, or don't have the funds available to take your dog to a professional groomer when needed, then you shouldn't get a Lhasa Apso, or any other dog with long hair or an undercoat. Lhasas, Shi Tzus, Poodles, Cocker Spaniels, and Yorkshire Terriers are just a few of the breeds that require time and energy (and money) on the owner's part to keep their coats healthy and in good condition.

Consider the Exercise:
If you picture you and your dog hiking and biking, then by all means you shouldn't get an English Bulldog or a Cavalier King Charles Spaniel. They have short noses which can lead to breathing problems and they can't tolerate heat or too much strenuous exercise. A Beagle, Labrador Retriever, or German Shepherd are just a few of the many breeds that would a better choice.