Just depends on the dog.... I never really thought dressing up dogs was nice except against cold until I got Gwen. I quickly discovered that whatever else she had been through, she had been taught to love clothes! No lie, really. It started with a sweater (she gets freezing cold very easily, with as little fur as she has), which she not only graciously stuck her neck through, but lifted each leg in turn. All I have to do is hold open the neck and she does the rest!
And not only for sweaters- she loves the "sun hat" her grandmother gave her! Rather strange, but she has converted this family. She gets to be a lobster for Halloween.