No offence, but for some reason some people just can't accept a simple fact: for some people this difference is still not a difference.
I've tried good coffee. At least that's what people told ne on multiple accasions where I was taken to "the right places" in multiple countries. On two sides of the globe (Brazil and Vietnam if we are talking about producers, not to mention countries that import the beans).
Thing is: no matter where it grows, no matter how they prepare it, fermented or not, different frying, different brewing techniques - all the same to me.
I can tell the difference. Some times small, some times very huge. But still for this difference is like a cat piss from some street cat and a cat with a pedigree.
It may have the ideal temperature, ideal acid levels, zinc amounts or whatever - still tastes like cat piss. The fact that it has a pedigree does not make it better.
Tea is whole different story for me though. But I do accepts that people are fine with whatever they love in their "english breakfast tea" or a nameless teabag.
All coffee tastes like cigarette ash to me. Similarly, I have been to places that people rave about. My buddy used to run a coffee shop. "Your beans were overcooked"; no, not it. There is something innate to espresso or something. Smells amazing. Tastes like ash.
Good espresso is really difficult to make, with the lighter the roast, the harder it is to get right. Most coffee shops can get good quality beans that smell amazing but without a well-practiced barista the shots will be excessively sour or bitter.
Dialling in espresso isn’t simply a matter of finding the right grind setting on the grinder and locking it in. One coffee may pour a perfect 9 bar espresso and then a different coffee might gush like a shower head and spray sour, weak coffee all over the place, while a third coffee could jam up like squeezing water out of a stone, with barely a drop of extremely bitter liquid falling in the cup, all on the same grind setting!
In other words, every batch of coffee beans needs to be dialled in separately, and there can also be a lot more adjustments needed than simply the grind (water temperature and brew ratio are big factors as well). An expert will know how to adjust at least those 3 variables (grind, temperature, ratio) all in concert to get the most out of a particular coffee. On top of all that, the true master can make use of grinder type (burr design) pressure, flow, and even temperature profiling to fully customize a shot, but that’s going far into the weeds.
Question: how is your sense of smell? My friend has the same opinion about coffee as you (he just drinks cheap diner joe) and his sense of smell is almost nonexistent.
I, on the other hand, have a pretty good nose and I can pick out peach, raspberry, toasted nuts, caramel, marshmallow, chocolate, and blueberry notes from a variety of different coffees I’ve bought. The smell of some of these coffees is mesmerizing, like walking into a high end patisserie.
Without that smell component, the coffees taste either sour or bitter or somewhere in between.
