Napa, Sonoma, Livermore, Woodinville, Rioja this summer..I mostly learn about global wines from great restaurants and wine bars in SF, Seattle, NY, Vegas, etc.
I'd love to own some of the Mosel's best rieslings, perhaps from Markus Molitor. Once, long ago, I tried a red wine from the Ahr region of Germany and it was wonderful. Ahr wines are almost impossible to find in the U.S., but I'd happily add Ahr reds to my collection.