Someone very dear to me considers himself a 'shapeshifter'. He does not like the term polymorph because he can only shift into living things excluding plants (which is considered taboo). I want to point out that this man I am speaking of happens to be one of the most attractive men I have ever met. I don't know if this on on par for his kintype, but I thought it was interesting enough to mention. I've known him for like....jeez, 16 years now, he and I constantly chat and worble about the logistics of all of it. He believes that therians and polymorphs are related and that they are more of natural occurance rather than a product of chaos; that polymorphic magic died and was sealed a long time ago. There is also a belief that shapeshifters and the jinn (or myth therefored named) are in the same family, reap the benefits of the same frequency of [sealed] magic. He says he had a true form the way one has a true name, and that they are related. Words and song are important to the shape he wants to take and that it is more important to 'shift' the background rather than one's self.
But Kayako brings up a good point by mentioning that polymorphs are seen as some sort of 'demon'. Stories from our history have always demonized things with the ability to change shape, or use the ability as a literary device in order to warn the reader. Perhaps they want to teach a moral lesson like in A Wolf in Sheep's Clothing. In fact, many fairy tales include talking animals too. There is Kitsune of the east, a woman that is a fox that is a woman that is a fox. There are local, cultural stories that include some horrible shifting animal or sentient beast that roam the countryside; if you were a child and heard this, wouldn't you be wary of going into the forest alone? Such is a moral lesson that demonizes 'polymorphs' as a sort of left-handed compliment if you think about it. I think it is easy to depict a shapeshifter as 'evil' in myth, a romantic tragic flaw in some cases, but mostly meant to be feared.
What I feel from my shapeshifter guy may not be the status quo though. To be honest, I've never been in the physical presence of another...But I get someone who is a 5 o'clock shadow away from being an animal human rather than a human animal. I think he knows things I don't because his other senses are just that much cooler than mine (though to quell my ego, I have pondered the possibility of instinctual cold reading, some sort of primal defense mechanism for survival....) He's also extremely charming to the other sex although he is not well spoken. His daily routine is completely random, like COMPLETELY, there is no telling what he's going to be doing one moment to the next let alone tomorrow. And he's prone to anger....But you know, I bet if he read that I wrote he's prone to anger, he would cry. Loyal to a fault, it sometimes gets him in trouble, but I love him anyway.
So that's my polymorph pov, I hope it was somehow helpful, or at least, well written.
"Will minus intellect constitutes vulgarity." -Arthur Schopenhauer