Faking it is a complicated practice. You may find that wearing a fake persona some of the time can be very useful – as a way of dealing with the public, or with colleagues for example. A certain amount of fakeness can be necessary for achieving a professional demeanour. If it works for you and enables you to get things done, then fair enough.
Playing a role, or roles you think other people want you to play, can be exhausting. Presenting as the person you think people want you to be, because you feel that your authentic self wouldn’t be acceptable, is pretty grim. I’ve been there, and I’ve done it. I’ve tried to be nice, and helpful and kind and co-operative with all comers. I’ve also failed utterly at this and found it left me feeling miserable and isolated. I am better off dealing with people who do not need me to be mostly working to please them. I guess a certain amount of this may be inevitable in life, but the question of how much you can stomach is an important one.
If you feel (rightly or wrongly) that you true self isn’t acceptable and that you must fake your nature to get by, it can be soul destroying. It can lead to bitterness, and resenting the people who don’t have to fake it. Behind the pleasant persona, a person can be burning up with rage and frustration. This can become an array of things. It might lead to the cognitive dissonance of narcissism, with the tension between persona, and feared worst version of self becoming the basis of dreadful behaviour. It can be a way in which oppression is piled onto the oppressed, too. If you are not allowed to function as a complete person with your own feelings and needs, this can add weight to other abuses. The pressure on the oppressed to ‘act nice’ is a way of keeping people down, and powerless and silent.
Faking it for the benefit of someone else may well be a very bad idea for your own wellbeing.
I think it all works very differently if you want to be other than you are. Pretending to be a certain way helps build habits and patterns of behaviour, and most of what we do is habit. Wanting to live a certain way by faking the habit until it becomes your normal life is a reasonable way to get things done. Faking attributes and virtues that you want to have, until they truly become part of who you are, can be a good way of making change. There’s an interplay between who we are and what we do. The person who wants to change who they are can get a lot done by changing what they do in-line with what they aspire to be.
I’ve done this around the issue of patience. I was not a naturally patient person. I’ve spent a lot of years faking it. I’m a more patient person than I was. I feel good about this because it’s a change I sought.
Our first responses aren’t always our best ones. We can react from experience, from family stories and cultural norms to think, feel and do things we don’t like. There’s nothing inauthentic about wanting to change. If the change is really about you, then you’ll feel good about making it, even when it gets challenging. If the change is about appeasing other people, it may always chafe, or make you miserable, and it probably needs questioning. Unless your nature inclines you to hurt and harm other people, you shouldn’t need to fake an identity for the sake of those around you.