Cats and Dogs
I am a cat person. Dog people bother me, with their overabundant enthusiasm, the urgent need to constantly be socializing. There are a few I can generally bear... but overall entirely too tiring to be worth the effort. I prefer cat people, those independent enough to function without constantly seeking your command or approval, who recognize your space without invading. Cat people might be thought of as aloof, although I think a better term would be reserved. Saved for people they like, those they know are worth the effort and bring out the kitten in them. People they can be playful with, who acknowledge the need for solitude sometimes. Dog people, so driven by interaction, don't always understand why we pull away or find some people overwhelming.
Or were you talking about people who want to own a cat versus people who want to own a dog? Being allergic to cats, I lean sharply towards the canine end of the spectrum. Being less allergic to dogs, though, I make a case for the reptiles. The lizards whose bright-eyed exploration of their terrarium and ferocious moth-hunts bring so much joy. The corn snakes who love sitting on your shoulders, content to just be company. The turtles who always look slightly confused, but willing to go along with it.