Orientals in general, more specifically Siamese, and blue-point in particular. I have read about the bonding tendencies of blue-points, so I'm not just making it up!
We have one that is very bonded with the wife. It will follow her round the house, off down the street (which is a right nuisance). On occasions if the cat doesn't know where the wife is when the cat believes her to be in the house, the cat will start miowing, and going into every room, looking.
In the evening, it will often sit on the path outside waiting for her to come home, or when it hears her car, will zip off to greet her.