I agree. Orcs are just violent, angry, impatient, strong, tribal people, but still think like humans who all have those traits. The thing about monsters is that you can generalize an entire race without being racist(well, technically, you ARE being racist, but it doesn't offend anyone because you are being racist towards an imaginary race).
My dragons think and act the same way I imagine a human who was arrogant, greedy, overconfident, extremely powerful, and immortal would act like.
In fact, a lot of the reasons that monsters are so human like is so that we can see our bad traits reflected in them. It teaches us a lesson about ourselves.
I think here you have to define your terms by what is meant by human.
For instance normal human behavior typically excludes the types of behavior that was typically evidenced by the worst, or maybe even the average, among the Gestapo and the SS.
Serial killers and those who violently rape and torture and murder are often referred to both figuratively and literally as "inhuman." Because those types of behavioral traits fall so far outside the norm of typical human behavior that it is often impossible for most people to really imagine motivations that make people enjoy slaughtering and dissecting and experimenting upon another person.
Those kinds of traits are indeed evidenced by some people, but their "normality" is considered so bizarre and abnormal as to be "monstrous." Indeed that is one of the very definitions of "monstrous," a human who acts as if he is not.
So I agree that monsters should be a sort of reflection of the worst in men, then again the worst in men can sometimes be so bad that it is completely alien to the rest of us. And that is as it should be I think.
And that is exactly what I mean by monsters being monsters, instead of just human-like.
Well, that's one thing I mean.
The second thing is that I just can't imagine a dragon, possessed of a dragon body, and a dragon mind and mind-set, and dragon senses, perceiving and interpreting the world in the same way people do, and therefore he would likely not behave like a person at all.
It would be as if a Polar Bear possessed human intelligence, or equivalent human intelligence I should say, and yet still possessed of a normal polar bear body, and senses, and view of the world.
Yes, there would perhaps be areas of behavior in which such a bear closely mimicked some human actions. But can one really imagine the bear going to the opera, hanging out at the mall, reading a book, or watching Lost. Would that be what really interested the bear (well, indeed, he might like watching Lost, he is intelligent after all), or despite his intelligence would he still be far more interested in being a bear than a man just because he is as intelligent as a man?
I suspect that even the bear with the mind of a man, so to speak, would still be a bear and not a man.
And would act that way. Within bear reason of course.
And the real dragon, especially the evil one, would not make much of a man either, though he might learn to think more like one if he thought it gave him a killing advantage over them.