It is a beautiful place, I lived in Seattle for 15 years, just moved to the bay area 2 years ago. The cloudiness is for real and it rains almost every day for 9 months. Seriously. You can say it's only a mist, or sprinkle, that's true.
I did my diving certification there, dry suit is required unless you're insane. I wouldn't get back in that water for anything. People do dive, but it is so unpleasant I can't understand why. When you have to do your mask clearing routines and let in water, a lot of people freak out and go to the surface.
Housing prices and traffic. Haha! All in perspective. I am back up there for work very often and while there is traffic, it's a joke compared to here. Housing prices are about half of what it is here.
The summers seem nice, but only because the other 9 months of the year are so dreary. "80 degrees, dry and sunny" is true, those two or three months are fantastic. Hiking and mountain climbing there is amazing, seriously, the place is beautiful. Mountains are only an hour away from the city if you're into winter sports.
Hipsters exist everywhere that's cool to live, Seattle being one of those places. Great diversity and plenty of stuff to do, the car culture is solid, no rust to speak of because it really doesn't snow much there. The overall culture is very progressive, very left leaning, but not as bad as Portland.
I would also mention the "Seattle freeze", it takes a while to really make good friends there. Maybe it's the weather that makes people closed off, I don't know. Everyone is very nice and extremely polite at the surface level, but it takes a while to build a good network of friends there.
In a nutshell, Seattle is perfect aside from the weather, assuming you're ok with the culture.