The Roast: light vs dark
The Kind: Arabica, Robusta or a blend
The Origin: which country which region
The Grind: coarse vs fine
Different processes and equipment need different sizes. Espresso machines need fine, tightly packed grounds.
Read up on the right water temperature for your chosen method. Ideally good coffee should be brewed at a temperature between 195 to 205-degrees Fahrenheit.
Coffee can leave behind an oily residue that can turn rancid. This will make your coffee bitter, or sour. Get rid of this by regularly cleaning all of your equipment.
Brewing time can be as short as 20 to 30 seconds for espresso, or as long as 12 hours for cold brew.
Pour your coffee in your favorite mug. And cream and sugar if you wish. Bring out a plate of cookies. Pick up your favorite book. Enjoy your coffee your way.