Of all the cats I have owned and fostered, only one has been orange (which is what we call them across the pond), but he was also pretty persistent and mouthy when he wanted something, whether it was one of his treats (he was the olive eater I mentioned in a previous post), wanted past a closed door, or even wanted in my lap when I was busy doing other things that prevented giving him attention. He would even resort to tearing through the house if he felt I was ignoring him, because he knew that drove me crazy and I would eventually give in to what he wanted if he started on one of his tears! So maybe it is a ginger/orange trait.