More anecdata; my orange boy also thought he was the family dog. He was rather dumb as a rock, but sweet as pie. Loved every human or animal he ever met.
My current cat is a calico and white and she's...emotional. =)
My next door neighbour was a ginger crossed with a persian. Let's just say there was a LOT of orange. The cat was very friendly to humans, and an absolute terror to foxes and any cat they didn't consider a neighbour.