Look, I like dogs. Well-kept dogs. But a dog is a perpetual infant. They need constant care and attention until the day they die.
Dogs smell bad if they are not constantly shampooed. I don't like my neighbors' dogs viciously barking at me. If my friends are dog-watching, I don't like them jumping on me and clawing me.
I totally understand why a lot of people like dogs more than cats. Cats are arrogant and not nearly as affectionate. But they are much easier and more independent. I guess you could say I've always had a soft spot for cats. At least my family had some cats when I was a kid. Even if they bit or scratched me, I would still try to pick them up and pet them.