While reading our suggestions, you shall remember that coffee taste is subjective. Therefore, don't be afraid to experiment. However, there are few tips that can help you when choosing your coffee roast.
The coffee roast can significantly affect your brewing method, and the coffee type can be chosen whether you use milk in coffee or not. Beans for espresso machines are basically roasted darker than beans for filter coffee. If you brew espresso on lightly roasted beans, it can give a taste that may not be completely balanced in terms of acidity, sweetness, and bitterness.
If you use very dark-roasted beans for your pour-over coffee, it will give a strong and more bitter taste. Whether you should use light or dark roasted coffee beans thus depends on your taste preferences.That means that the way your beans are roasted means a lot to the taste of your coffee.