Trying to fit a stereo/archetype, while refusing other ones usually means there are some aspects of us that we wish to enhance, and other ones we wish to veil, because it's hard to accept ourselves as a whole, without creating something that feels like "a better us". Something that feels acceptable, because it is familiar enough that we see ourselves in it, but is different enough to be acceptable or exciting.
So if one looks at what a type would mean to them, or what is something they aspire to be and not to be, it can help with gaining insight and acceptance towards one's self, emotions, shortcomings, darker aspects etc.