I love both, but as it's already been said, cats are a lot more independant and like to go out and do their own thing. Puppies and kittens are both equaly adorable, though.
When they are fully grown, I prefer a larger dog, because they're easier to hug

It's like having a giant, living teddy bear, lol. But, having said that, we have one tom cat who always puts his arms around me when I pick him up, which cheers me up.