No, but I do react in extremely different ways depending on the situation, in one I might be serious, morose, and "informative" there is a fairly large group of people who have known me as being that and that only, but there are also situations or people that I will react in an extremely aggressive, caustic, violent, sarcastic, and manipulative way, which can be a surprise for people who have only ever seen me react one way. For example the first kind of reaction was often seen at school and people would be surprised if I even cracked a smile, then I'd get home and talk to my who I'd would almost never be serious with. And then there's my encounters with people who I consider ignorant, misinformed, obnoxious or whatever, which is usually on Internet Forums and in those places I develop a reputation for attacking people. No none of that is faked, they're simply reactions to attitudes or behaviors.
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"They do, but what do you think is on the radio? Meat sounds. You know how when you slap or flap meat, it makes a noise? They talk by flapping their meat at each other. They can even sing by squirting air through their meat." - Terry Bisson