I have a Russian blue, and like diannia cats, My ZOey is like a dog. plays with and fetches toys, waits at the door for daddy to return, sleeps with us, talks up a storem and has conversations with us, askes for things, treats and affection.
I honestly think it depends on how you raise your kitten. Although, rag dolls and maine coons are known for their affection. My Russian blue is the smartest cat I;ve had, I've loved all my cats like children, equally, the maine coon was my sons, but the cat I have now is definitely the smartest.