You never really know someones temperament until you don't say good morning to them. It takes me until a few hours after I wake up until I feel like speaking. Unfortunately this does not correspond to when I am in the elevator in my apartment building on my way to work. I of course live in an apartment building filled with lonely people who wake up speaking. Sometimes I am able to mouth a smile when greeted in the early morning other times I am not. It really is not personal, I just don't feel like talking to anyone when I am rushing to work in the morning. Sometimes I can't respond quickly enough to my chatty neighbors who continually press the issue and keep saying good morning until they get a response. Often they get mad because I did not say good morning back. Sometimes I am able to explain to them that I am just to tired to speak which I realize does not go over well, but then again just because they want to chat in the early morning does not mean that I do, especially with people I barely know. The truth is if the roles were reversed I would just assume that they did not hear me if my good morning was not returned. Then again if the roles were reversed I would not have said good morning to them in the first place, at least not until after ten o'clock.