Yes, you shouldn't try to be someone you're not. And it's kind of pathetic when people try to be someone else in my opinion, which is why sometimes I dislike Zendaya and other people at times because they act fake.
Yeah, especially for me, I'm fucking awesome who wouldn't want me to be myself? Though some, it makes it easy to tell who's the psycho. Why would I want them to hide that fact? xD Better to be out so I can avoid than hang out and find out that person's psychotic up their arse. The weird people are cool though.
But in a professional scenario, you need to adjust i.e. I am totally uncomfortable talking to people in real life, that's just me, but, when talking to film directors or anything else professional, I need to force myself to be different and madami out there in order to get the job done. Such is life in the real world.