People in WA are generally laid back. Usually outdoorsy in a North Face sort of way, lol. Real Washingtonians don't use umbrella's either.
We also like coffee. Lots and lots of coffee.
There are two major hospital organizations in Wa that are located in S King County and Pierce County. They are Franciscan health system and Multi Care. I work for Franciscan (FHS) and really like the organization. They own 5 hospitals in the area. FHS also has medical groups, hospice, etc.. Multicare owns roughly the same number of hospitals and nurses that I know seem relatively happy to be working for them as well.
In Seattle you have facilities associated with the U of W. All teaching hospitals and IMO all very good.
I can't speak for job availabiilty with them, but my hospital has a boatload of night shift openings. A few friends easily found jobs as Swedish/Issaquah but both are not happy there.
There are only a few hospitals I would avoid, but I will be nice and not post names here.