What is the personality trait of a Tennessee Walking horse?

Like all animals, they have their own personality, but in general they are very sweet.

Answer2:

Tennessee walkers have always been bred to be very willing and sweet tempered horses. Walkers are some of the most even tempered horses as far as purebreds go. However there are those within the breed that fall outside the norm (just like with any breed). Remember all horses are individuals and may not understand that the breed standard says that they're supposed to be sweet and willing.