According to Hal Herzog, professor of psychology at Western Carolina University and author of the upcoming Some We Love, Some We Hate, Some We Eat: Why It Is So Hard to Think Straight About Animals:
People tend to gravitate toward the animals they were raised with. Cat owners tend to be raised in cat families, and dog owners tend to be raised in dog families. In fact, one study found the animal you like is the one your grandparents lived with.
Do the pets you own now correspond with those you had as a child? And if you know the pets your grandparents had, share that in the comments below!