There isn't necessarily a "best" year for Cabernet Sauvignon, as the quality of the wine depends on various factors, such as the weather conditions during the growing season, the vineyard location, and the winemaking techniques used.  However, some vintages are generally considered to be exceptional for Cabernet Sauvignon, such as 1997, 2001, 2007, and 2013 vintages in Napa Valley, California. Ultimately, the best year for Cabernet Sauvignon is a matter of personal preference and can vary depending on individual taste.