There is no definitive answer to this question as it depends on personal preference. Some people prefer a light and fruity coffee, while others prefer a dark and rich coffee. There are many different types of coffee beans, so it is important to experiment until you find the one that you like best.
Some of the most popular coffees for black coffee are Kenyan, Ethiopian and Brazilian beans. These all have distinct flavour profiles that make them stand out from other coffees. Kenyan beans have a fruity taste with floral notes, Ethiopian beans are known for their berry flavours, and Brazilian beans have a chocolatey taste.
When brewing black coffee, it is important to use freshly ground beans and brew using filtered water. This will ensure that your coffee has the best possible flavour. If you want a stronger cup of coffee, you can brew for a longer time or use more grounds per cup.