: Results in "grassy," hay-like, or papery flavors if the bean isn't roasted thoroughly to its center.
If you are looking for alternatives or ways to extend the coffee ritual without over-caffeinating: Coffee Roasting: Development-time Ratio - Pete Denison
If you want to better appreciate the nuances of different beans, try these professional techniques:
: Can lead to a loss of acidity and floral notes, replaced by charcoal, toast, or "ashy" bitterness.
: In espresso, catch the first, middle, and last third of your shot in separate cups. They will taste radically different, helping you understand extraction stages.
: The best way to learn is by comparison. Brew four different beans using the same method and look for differences in sweetness, acidity, bitterness, and mouthfeel.
: For peak flavor, green beans should be used within 15 months of harvest, roasted beans within 15 days , and ground beans within 15 minutes of brewing. 2. Develop Your Palate