This has been an AWESOME thread!
We're in AZ, but planning on moving to WA State as soon as we can sell our house. We haven't settled on any specific area yet, but are considering Island County, Skagit County (Anacortes & Bow), Kitsap County (Kingston, Pouslbo, Indianola) and Jefferson County (Sequim). My dad lives in Coupeville on Whidbey. I am already prepared to grow webbed feet. I'm excited to hydrate my dried out, parched AZ body.
It's been interesting to hear your thoughts on weather, traffic, city vs. rural life, etc. We're looking to be in a more rural area but need to be close enough to get into the city without traveling too terribly far. We also really want to be near the water.
Do most of you fly to DLR? I can't imagine doing that drive. I'm afraid our Disney trips will dramatically decrease once we are in the Pacific Northwest.
Some thoughts.
You mentioned in another post that the Peninsula calls you b/c of cost of living. I suggest comparing Seattle prices to, say, Tacoma prices. You'd be happier with Pierce county prices then.

The Olympia area is also nice, in every way.
The problem with being all the way out there on the peninsula, or OMG over in Sequim, is that you are SO far away from things. Anything touristy (and even after half my life I still LOVE doing the touristy things around here!!!) is going to require a drive with a bridge toll, a longer drive, or driving with a hefty ferry fare. I lived out on the Hood Canal for a year, and it was LOVELY.
But then we had a huge storm with wind, snow, and ice, and we were locked in our house for almost a week with no heat. Half our house was over the canal, so it was even colder than a normal house would have been. When the water went out (the water tanks emptied, and there was no electricity to fill them back up, so all of us were stuck), that's when we worked all day to dig ourselves out of the snow and get OUT.
That can happen anywhere, of course, but being so far away from everything made it feel even worse.
And of course it makes the trip to Disney longer, b/c first you have to get to I-5 or the airport, and pay for parking. Whereas being in Tacoma, before we decided to drive, we were going to grab a downtown bus to get to the airport, and leave our car at home!

We took mass transit to get to the train station to start our honeymoon, too.
Anyway, there are other areas besides the very west coast that have semi-reasonable costs of living.
We just got back from a driving trip, by the way. If we were ONLY going to Disneyland, we probably wouldn't drive. But ours was a multi-faceted trip, and we were looking at renting cars and whatnot, so we decided that driving in our plush new (used) car would be a better idea. Everything took MUCH longer than it should have done. We still don't know why, it's a big mystery.
Those are my varied thoughts.
I noticed in your later post that you homeschool! Yay! DS is only 3, and compulsory education in WA starts at 8, so we're not quite to the formal schooling stage yet...but I know there are tons of homeschoolers in this state, and it's pretty easy, it seems, to do it without problems. You can even take advantage of the occasional class or sport without the child being considered "in" school, and I've heard the Running Start program (taking part in college classes while finishing high school work) is even open to homeschoolers!