(taken from Wikipedia)
Boston Terriers have friendly, very strong, lovable, unforgettable personalities. Bostons can range in temperaments from those that are eager to please their master to those that are more stubborn. Both can be easily trained given a patient and assertive owner.
While originally bred for fighting, they were later down bred for companionship. The modern Boston Terrier can be gentle, alert, expressive, and well-mannered. It must be noted however, that they are not considered terriers by the American Kennel Club, but are part of the non-sporting group. They were originally a cross-breed between the Old English Bulldog and the English White Terrier.
Some Bostons enjoy having another one for companionship. Both females and males generally bark only when necessary. Having been bred as a companion dog, they enjoy being around people, and, if properly socialized, get along well with children, the elderly, other canines, and non-canine pets. Some Boston Terriers are very cuddly, while others are more independent.
Several health issues are of concern in the Boston Terrier: cataracts (both juvenile and adult type), cherry eye, luxating patellas, deafness, heart murmur, and allergies. Curvature of the back, called roaching, might be caused by patella problems with the rear legs, which in turn causes the dog to lean forward onto the forelegs. This might also just be a structural fault with little consequence to the dog. Many Bostons cannot tolerate excessive heat and also extremely cold weather, due to the shortened muzzle, so hot or cold weather combined with demanding exercise can bring harm to a Boston Terrier. A sensitive digestive system is also typical of the Boston Terrier. In the absence of proper diet, flatulence (lots of farting!) is associated with the breed.
Bostons may be prone to snoring and reverse sneeze, a rapid and repeated forced inhalation through the nose, accompanied by snorting or gagging sounds used to clear the palate of mucus, but does not harm the dog in any way. Bostons are also prone to sensitive stomachs and intestinal gas.
They can live up to 15 years or more, with an average of around 13 years.
Are you ready for the probability of some MAJOR vet bills?.