The only reason I dislike chihuahuas is their behavior within the realm of a domesticated animal.
Don't blame the animal, blame the owners who fail to properly train them and let most troubling behaviour slip because "Isn't it cute? ๐". Now imagen the same behaviour from a dog 7 times its size and 20 times the weight. In essence most Chihuahuas are spoiled brats with a enabling parents.
Spiders for the simple fact that I have been "conditioned" by my mothers behaviour to fear them, cause she freaked out at the sight of even the tiniest one.
They are incredibly fascinating creatures.