I'm with Mary to a certain extent. The one thing that I can't stand about cats is their need to walk all over the counter or dining room table after scratching around in their filthy litter box. I've had cats but they learned to stay the hell off the table and counter at an early age.
I have a big Labrador retriever that I am very fond of, but he does not ever go into my bedroom. He has his own bed in the living room. I don't get into his bed, he doesn't get into mine.