Oregon Coast is better set up than either Washington or California. And ride north to south, especially in Spring, Summer, and Fall. If you go in Winter bring a snorkel.
Just south of Crescent, City, CA (really the northernmost town on the route in CA) you end up on a shoulder less four-lane highway that is often very foggy. Not fun at all. Sections of highway 1 in CA are awesome riding and generally lightly traveled, but when you get stuck on the 101 or even get too close to San Francisco or LA it just plain sucks.