It turns out that the “dog people” — based on how people identified themselves, not on what animals they actually own — tend to be more social and outgoing, whereas “cat people” tend to be more neurotic but “open,” which means creative, philosophical, or nontraditional in this context.
Dog people scored significantly higher on extraversion, agreeableness and conscientiousness measures, and lower on neuroticism and openness than cat people, the survey found. The effect persisted regardless of gender of the respondent.
“Once you know the findings, it kind of falls into place,” Gosling said. “You think, ‘of course, agreeableness and extraversion — dogs are companionable, they hang out, they like to be with you, they like your company, whereas cats like it for as long as they want it, and then they’re off.”
http://articles.cnn.com/2010-01-13/health/cat.dog.personality_1_cat-people-dog-neuroticism?_s=PM:HEALTH
Are you a dog or cat person?