Six AVA's tightly focused on soil types, with no vineyards lower than 200' elevation (the rich bottom land is for hay, hazelnuts, fruit trees and veggies). Multiple clones of Pinot Noir, with the older ones making more exciting wines than more recently introduced Dijon clones. Challenging weather that requires extra care in the vineyards. Devotion to sustainable farming at its best. Meticulously manicured vineyards. Strong sense of community. More than 500 mostly tiny wineries, some of them funky farms, others dazzlingly modern. An easy drive from Portland. Similar to Napa Valley in many -- but not all -- ways.
If you're planning a visit (highly recommended) to the Willamette Valley, Susan Sokol-Blosser's At Home in the Vineyard provides an excellent preview.