Antonyms for conventional formalities are unconventional informality, casualness, and spontaneity. In today's world, people are more inclined towards informal settings and prefer to avoid conventional formalities. Unconventional informality brings a sense of ease and comfort among people, which makes communication more natural and authentic. Casualness in communication helps build a better rapport with people and fosters a healthy relationship. Spontaneity helps in creating a relaxed environment, where people feel free to express their thoughts and ideas without any fear of judgment. These antonyms contrast traditional self-consciousness and take people out of their comfort zones, leading to greater creativity and inspiration in group settings.