stevehawk's reasons are not far off.
I'd add that my wife really loves the scope of practice - she does literally everything from delivering babies (w/an occasional C-section) to gerontology, from addiction medicine to ER. This just doesn't happen elsewhere.
And we like the space. The road we live on ends in a wilderness area, the hiking and X-C skiing and so on is amazing. And both us and our 6 year old love having sheep and alpacas and a dozen chickens and a greenhouse. Hobby farming like this just doesn't work in Seattle.
We miss live shows and restaurants and all the city stuff, but for now at least we like this more.