Cats and Dogs

I've got this rough theory about people and I thought I'd share and see if anyone agrees or disagrees. I think that there are "dog people" and "cat people". Now, I don't mean this in the sense that some people like dogs better than cats or vice versa, but in the sense that they are like dogs or cats in the way they act.
I know that I am generalising dogs and cats here, because there are dogs who hide behind sofas and cats who jump into every stranger's arms. But on the whole, as far as I am aware, dogs are far more outgoing, lively and immediate than cats, who are more cautious, especially in new situations, and who need a lot more space (and will let you know in no uncertain terms when you intrude). This is in some part because one is a pack animal - hence the socialising bit - and one is a solitary hunter. Think how differently cats and dogs explore new surroundings. (Hm. I wonder if big cats who run in prides are different... never mind, that's beside the point.)

So. Dog people and cat people. Dog people would be gregarious, sociable, assertive, occasionally loud, enthusiastic, thriving in the company of others. Cat people, by contrast, would be more cautious, calm, taking some time to get comfortable with places and people, happy in the company of a few people, but equally happy to be on their own and, in fact, needing time on their own, but always good for a surprise attack (in a positive sense). Both can be fun to be around with, both have their good and their bad sides, and both have a point.

I think this is a pretty good approximation, and also a good explanation without reaching for any sort of psychological terms, of extroversion and introversion.

What do you think?