Clear expectations decrease misunderstandings between you and your children, your spouse and even your boss. Unclear expectations set the stage for failure. Moreover, clarity of thought results in authoritative speech. And by the way, it's OK to have high expectations and want what you want. It will happen when you are clear about what you want and go for it.
Men speak concisely to establish status, which commands others' attention to what they say.
Women speak to gain intimacy and closeness, which in most cases doesn't give them an edge when it comes to realizing their desired goals. Remember that less is more and be concise in your delivery. It doesn't matter if the person you are speaking to agrees with you. There is no need to apologize, qualify or be tentative. Being assertive and direct doesn't mean being nasty.