The farmer can pick at the peak of freshness, and the mill can process it the best way possible. The importer can get it to the roaster as fast as possible, and the roaster can get the perfect roast on it. Then it goes to the consumer.
You are the final link in the puzzle. Whatever you do to the coffee is going to have the biggest impact on it. If the water isn't just about perfect, if it doesn't soak the grounds long enough, if it sits in the pot on the burner for hours on end, that will change how it tastes.
Everyone has their favorite style of brewing coffee. I have a friend that swears that the Bunn Coffee Maker is the best. Another that uses a French Press. When I have time, I prefer a pour over. Another friend likes to make JSA Coffee in a percolator because they think it's the best. Everyone has their own take on it. To me, two things are the most important.
Type of grind. The grind has to match what style you use to get the best taste out of it. If you use a Turkish grind in a percolator, be prepared to have alot of fine grounds in your coffee. If you use a Turkish grind in a Bunn, you might overflow your filter. If the water is too cold, you won't get the flavor out of the grounds. Too hot, and you could burn the coffee, giving it a bitter taste.
When I set up for a pour over, I fire up the electric kettle to get the water boiling fast. Our kettle shuts off once the water starts to boil. Then I take quick read thermometer that should be in every kitchen anyway, and check the temp. Once it goes down to around 210, give or take, I start the pour over into grounds just a hair finer than Auto Drip. The ideal temp for water, depending on where you read, is between 190-200 degrees. When I set up commercial coffee makers as I repair them, I set the temp after the pot to about 190, so I know the water hitting the coffee grounds is right where I want it to be.
However you like your coffee, find the proper grind for your process, and get the temperature of the water to the sweet spot, and your coffee will be perfect.