Many people find themselves drawn to craft beer due to its complexity in flavor profiles ranging from caramelized malt sweetness complemented by piney hop bitterness to notes of tropical fruits derived from wild yeasts cultivated over time in oak barrels aging various styles such as sours or imperial stouts which are typically aged longer than two months before they're ready for consumption — just one example being Samuel Adams Utopias– a strong ale aged up to 24 months!.