Assertiveness is defined as confidently aggressive, or self assured. Aggressively confident often sounds like a rather bad tone of being, but truthfully it isn’t. Being assertive opens more opportunities than being shy could ever offer. It shows you know what you desire to achieve and your determination to achieve it. What you will allow is what will continue. If you are assertive and say no then it all stops there, but if you are overly passive about something you do not like or are not comfortable with then the situation or thing bothering you is probable to reoccur several more times until you erupt and stop it. Being assertive is sometimes seen as mean or rude, but somethings need to be said and if they are not said then they continue. Say your neighbor keeps parking in your driveway and you need to go out, but often can not due to this then being assertive with them is often the answer. if you go and ask them politely but firmly if they could stop parking there then they will have no choice but to listen to your demands.