I'm not saying it's the same for everyone, but it does come into play with me. I imagine the level of one's introversion also is a factor. I am mostly introverted, but I have bursts of extraversion, and when I do, sometimes I'll FEEL like being a "yay" person, but it's still my choice. It's okay if you don't want to "yay," but deliberately choosing not to out of principle, just to be different, is not necessarily more "real." It might feel more real, but can also be a way to distance yourself from your humanity. I struggle with this idea a lot, and I don't know if it's an INTP thing? I feel isolated, so I make an effort to understand people better and my chameleon skills go to work. But then I feel uncomfortable after a while, b/c it feels inauthentic. Then I go back to being ultra-independent, which is a lot of the time just going against the grain to feel different/individualist. It's something I've struggled with my whole life, and I don't know if I've ever really come up with an answer for it.
I guess the closest I've come is to realize that there are a small group of people with whom I feel authentic, and I don't ever have to think about issues like this around them. These are the friendships that matter to me. It's only among acquaintances/work colleagues/etc. that the "fakeness" issue comes into play.