Cup of Confusion

I love coffee on work mornings. I don’t necessarily have to have it on the weekends, but on the weekdays when I have to get up early and go to work, I just love drinking it. It also helps with the appetite and the lion within doesn’t roar at 9:30 if I drink a hot cup of java. My question is this, “If you make the same kind of coffee every day, the same way every day, by the same person, then why OH WHY does it taste differently each time?” Do you think it is taste buds? Or perhaps your morning breath worse one day then another? I just don’t get it. Anyone have any thoughts on this subject?