An Interesting Gap-Filling for Chinese Zodiac Sign

In the picture, find the best word that describe the character description with the right Chinese Zodiac Sign.

Keys:

Rats are lively.

Pigs are loyal.

Snakes are intelligent.

Dogs are diligent.

Horses can be unpredictable.

Roosters are very communicative.

Dragons can appear scary to some.

Rabbits are considerate to others.

Sheep are good natured.

Monkeys are full of energy.

Tigers are optimistic about life.

Oxen can be stubborn.