Remember managers are people, and should be treated as such. Managers, like other people come in all different shapes, sizes, and personalities. Managers should be respected, no more, and no less than anyone else. The key is to identify the managers "hot buttons", at that point you can assess their opinions on rank and experience. You have to remember that the company put this person at the position of manager for a reason, so they take negative thoughts very strongly, as they made the decision. Some people will say a manager is stupid, but if you are saying that to the person who hired the manager, you are essentially saying "your stupid". When it comes to disagreements, if you have identified hot buttons, and talked to them about everyday thoughts, you will have an idea to how they are going to react to issues. If you disagree, you typically should be straight forward, and advise them you disagree, and why. Don't be confrontational, and if you can make them responsible your fixing the issue in their mind, it is even better. Nobody likes to be attacked, but everyone likes to be supported, so be supportive, but address your issues, and most importantly "ask for their help". People like to help others, so managers like to be thought of as problem solvers. Good Luck...