The representative from Guinness, the winner of this year's best imported beer, gave a good explanation of why Samuel Adams beer is so important to the American beer palate. Before the Boston-based brewery began selling its robust-flavored lagers in the 1980s, American domestic beer was unchallenging and unfulfilling, and there was little interest in Guinness or more exotic varieties of beer. Samuel Adams raised the bar and created both the demand and the economic model that could support a nation full of microbrewers.