My favorites were the Kushi (tiny and sweet), hama hama (medium sized and great flavor), totten virginica (ridiculously large, but huge flavor kicks in after a couple of seconds), and my favorite - the Humboldt Bay Kumamotos (crispy, insanely creamy, and great flavor). What I learned was although I was craving Washington Oysters, the only one that really stood out for me were the Hama Hama's. All the others were from Vancouver Island or Cali?
And as much as we love being singled out, honesty requires us to admit that Totten Inlet Virginicas are also farmed in Washington State. Another thing: frequently people characterize Hama Hamas as being a particular size. But, like any other creature, our oysters start out small and then grow large. There are some species of oyster, such as the native Olympia, that stay small even when fully mature... and occasionally a branded oyster, such as the Totten Inlet Virginica, will be marketed as a specific size (in the T.E. Virginica's case, large). But Hama Hamas are extremely accomodating, and can be any size you want them to be.