I'm a bit unusual in that I'm both a dog person and a cat person. I wasn't a cat person until I met a Ginger Tom called Ollie!
Oh cool, I have three dogs myself
Great! A study in 2010 found that dog people are more sociable and outgoing than cat people.
I never knew that what else does it say?
Well, another study in 2014 found that dog lovers tend to follow rules, whereas cat lovers are more introverted and more open to change.
Sounds about right and fits with my personality
conformists, as well as scoring higher on intelligence tests than dog lovers. Studies have shown that cat owners are more likely to have higher blood pressure according to CNN.
See also.
- Cat lady, a derogatory depiction of a female cat person
Further reading.
- Dog people and cat people differ on dominance-related traits
Cat people and dog people
The terms "dog people" and "cat people" refer to a person's domesticated animal preference. Some people base a significant portion of their identity around their affinity for either cats or dogs, describing themselves as a "cat person" or a "dog person". This builds on the perceived dichotomy between cats and dogs as pets in society. The two terms refer to people's self-identification, regardless of what pets they actually own, if any. 
A 2010 study