My favorite white is Monkey Bay Sauvignon Blanc. I drink it, I cook with it,
I drink it *while* I cook with it... I use it almost every day.
As far as reds, I don't drink them as often as whites - I don't have a favorite right now, so I switch around. I'm still looking for the perfect Merlot.
For Chardonnay, I like J. Lohr Riverstone, but I rarely buy it, since I prefer Sauvignon Blanc.