Menage a Trois is a good solid red, Rancho Zabaco Zin is a good one, many of the Aussie shiraz;s are a good value. New Zealand Sauvignon blanc is a good value (even Monkey Bay, better Starborough). Rose in the summer - Coteaux d'Aix en Provence is a favorite, or just Cotes de Provence, usually under $10 a bottle. Gruet Rose or Blanc de Noir is my choice for bubbly, which can be fun to play with as well.
Perhaps I should have a hobby wine tasting...
Now if I bring a bottle... that's another list. Cheers