Using pronouns to signify ones gender identity has become rather common lately. It's an important think to emphasize the chosen identity of a person and it can also strengthen the feeling of individuals self. Especially for those who don't comply with the "norm". After all, our gender is quite big part of who we are.
Using pronouns as a self reflection is powerful thing. It can shape our self image, just those few little words. But what I think could be even more important is paying focus on the adjectives we use to describe yourself as well.
Unfortunately it's quite common we often use negative ones when describing or thinking about ourself. It leads to the negative feedback loop and we might start to believe what we say about ourself.
So while using pronouns can strengthen our gender identity the adjectives, used in positive way can definitely have the same strong effect on how we define and feel about ourselves.