I am very assertive , but am also very respectful, of people's feelings, space, etc. I have always worked as a supervisor, and it comes with the territory. As said previously, to not be mildly assertive lets everyone else take advantage of your good nature, inability to say no, etc. I rarely raise my voice, but have been told the look in my eyes says it all. I can only remember once in the past 5 years, I was aggravated enough to raise my voice, (as aggravation comes with the territory) and I had listened to the same old sob story by the same aide, who worked herself to death to pay for and feed a 100 year old horse she had had as a child, and a worthless drug addicted, alcoholic, non working 38 year old son, who never said THANKS MOM< and all I had to say was " C..... THAT IS ENOUGH!" Earn your respect and you will have no problem.