I have spent many years thinking about this very question & I can HONESTLY say, without reservation SEATTLE, WASHINGTON (city life) or Bremerton/Quilcene (rural) - depending upon lifestyle preference.
I am not kidding you when I say it is so beautiful & friendly.
The weather is not as bad as everyone makes out. It rains a lot in the winter, but west side (Seattle side) of the mountains gets snow only once every 4 or 5 years (less now due to global warming I'm sure).
You have every landscape within a few hours drive & California, which is Washington with hotter weather is only a short drive or flight away to visit. There is just too much crime, extreme weather (earthquakes), immigrant population (hahahaha), litter, smog & actors for my liking.
Washington state (not Washington D.C. - which stands for District of Columbia) is designated 2/3rds National Park, which means it is protected by several city, state & national bodies. It is CLEAN like Canada (only 4 hours away), but without the tax rates. There is hiking, fishing, rafting, white water rafting, camping, swimming (there are thousands of lakes dotted around state).
Most of the state is relatively unspoiled. There are a lot of jobs & the economy is good. The city itself is BEAUTIFUL, clean & friendly. It is broken down into areas centered around 'hills' 'Beacon Hill', 'Queen Anne Hill', "Capital Hill" (gay district), University District and water plays a major role in it's layout. The city is FULL of parks & lots of free stuff to do & see. I LOVE IT!!!!!
Yet, if you travel only a few hours outside, you could literally be standing on a mountain (2 huge mountain ranges run through state) without another living soul in site. Mt. Rainier is HUGE, its so high you can only get up to 'look-out' point for about 4 months a year. They even have Ice Caves that you can explore through in spring/summer.
The state is full of history & culture. There are several Native American Indian reservations dotted around the state, that encourage visitors to come and see the beautiful magical NAI way of life. Most of the names around Washington are NAI, including Seattle (which was named after the GREAT Chief Seattle).
PLUS, if all that wasnt enough to at least tempt you to visit - it is also the COFFEE Capital of the US. Not to mention all the GREAT seafood restaurants.
I am moving there next year, if I can ever figure out the immigration process for my husband (problems for another thread I think).
Honestly, do yourself a BIG favor and at least go there for a visit, I am pretty sure you will love it and never want to leave. Start by looking at some tourist sites for Washington State, I think you will be stunned by it's unspoiled beauty.