My Riley is a 'paw sucker'. Just like a little kid sucks their thumb my Riley sucks his paw. I've never seen another cat do this. He has done it since he was a kitten. I think it is adorable.
I have a British Shorthair and she doesnt really look like her features are of that in her face and jawline ( from what I can tell) . Her markings look a bit like a Ragdoll, but her disposition could possibly tell you more than just her mere appearance.