I have a cat currently, but I've always wanted to have a Bernese Mountain Dog (look them up. Literal living giant stuffed animals). I just love big cuddly dogs, and they have such great demeanors it seems like a dream to own one.
I love both cats and dogs but if I have to choose one over the other I would choose a dog. Cats can be a little moody sometimes (can't we all though right) and I feel like I just want to come home and cuddle with my pet and dogs are usually good at that!