It annoys me when people are late, but I can deal with it. What is worse is when other people cause ME to be late. If I say I am going to be somewhere at a certain time, I will be there before that time, if only just a minute or so before. Someone else causing me to be late reflects poorly on me to the person with whom I scheduled the time. I become incredibly irritable. 
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Those who cannot tell what they desire or expect, still sigh and struggle with indefinite thoughts and vast wishes. - Emerson
Selfishness is not living as one wishes to live, it is asking others to live as one wishes to live. - Oscar Wilde