Well Seattle will have some more new residents soon...
Not excited about the damp though. Lived in LA so the traffic will suck but not surprise me.
Well, you won't be alone. Seattle Metro area are had ~2,000,000 people for decades until about 15 years ago. Now it is 3,800,000. It has increased by 1,000 PER WEEK on average since 2010!
When I moved here in 1971, the economy was the worst in the US, but I loved it then, and still do, although it is obviously not a secret anymore.
Traffic is pretty bad, but nowhere near as bad as LA or other CA cities or my hometown, Chicago.
I've always liked Ca., but the population density in the better spots is outside my comfort zone. It's not that bad here yet, but you need to choose your times for the National Parks, etc. to avoid the crowds.
I do worry that another million or more people in this area could change my view. I live downtown and can walk to many great things. The infrastructure improvements are running behind the rapid growth rate.
Vancouver BC is another great NW city with the same issues.
Rain? Not nearly as much as the reputation. 36 inches/yr is less than NYC, Chicago, Philly, etc., but the 4 months of solid clouds and cool weather in winter gets some people down.