I am honest to a fault, with everyone. People know not to ask me my opinion or a question because I am going to be honest and they might not like what I have to say. People say they want others to be honest with them but in reality they really don't want to hear the truth.
The one thing I do hate is if you say you are going to do something than do it. For example don't tell me you will get back to me and then never do, don't tell me you will call me next week and then never do. After a person does this to me a couple of times, I come to the conclusion that there words don't mean anything.