This video compares arabica and robusta beans. I think most stores sell arabica coffee beans, probably because they want to make more money. But next time I buy coffee beans, I want to try out the robusta beans.
Arabica beans have a smooth taste while the robusta beans make a bitter coffee.
Arabica is more expensive.
Light to dark roast beans. Italian or French Roast tend to be on the dark roast side. I tend to like the medium to dark roast the best. Use mineral or filtered water. Brew your coffee until it starts boiling, before pouring into your favorite mug.