One thing I find interesting, though a bit annoying in practice is that coffee from the same materials and with the same process still can vary quite a bit. I've been using an Aeropress for some months now, and even if I keep all the major variable the same, it still tastes different.
I don't trust my senses here entirely, and as it's not blind I can easily fool myself. But the amount of agitation and differences in pouring might affect the taste here sometimes. Though my impression is that this is not always noticeable, but if I'm on the border of the coffee becoming bitter or sour it gets noticeably variable between preparations.
The other part that I'm quite sure of is that the temperature you drink at affects taste a lot more than I thought. If I drink the coffee too hot it tastes bitter, and it noticeably improves at lower temperatures (which is different from what I remember from cheap, pre-ground coffee, which tends to taste really bitter when it gets colder).
I don't trust my senses here entirely, and as it's not blind I can easily fool myself. But the amount of agitation and differences in pouring might affect the taste here sometimes. Though my impression is that this is not always noticeable, but if I'm on the border of the coffee becoming bitter or sour it gets noticeably variable between preparations.
The other part that I'm quite sure of is that the temperature you drink at affects taste a lot more than I thought. If I drink the coffee too hot it tastes bitter, and it noticeably improves at lower temperatures (which is different from what I remember from cheap, pre-ground coffee, which tends to taste really bitter when it gets colder).