That's really tough. I've toured Napa and Sonoma a few times, and I've been to so many wineries, it's hard to remember what I've tasted. After so many wineries in one day, they all started to taste the same...I was pretty drunk, lol. However, I'd probably have to say Sterling Cabernet, Ravenswood Zinfandel, or BV Cabernet. For a white wine, one of the only ones I like is Kendall Jackson Chardonnay.