Wild animals
I like wild animals, because they are very interesting, every animal 'telling' a story about his home.
Wild animals are so different from the animals we see everyday... Maybe that's why a good procent of people would prefer to go and see them in flesh and bones.
I'm sure they miss their homes, since when we go to zoo they look at us so deep like they are crying, but they still can find a time to make us happy.