I agree, the vibrancy of Seattle is pretty incredible right now.
Belltown and South Lake Union are booming like crazy, though people are worried about the new Amazon HQ overwhelming the space. Fortunately, there is a healthy mix of high density housing going in all around the HQ, you could walk to work in this case.
BNSF has been gradually donating or selling old ROW's along the lake and canal routes to turn into bike trails. It really does make for a bike friendly environment.
I lived in Queen Anne for a few years, and I kind of liked the "quiet" side, being so close to the urban core, but not getting swamped with traffic and light pollution.
The most ripe for the next wave of transformation is the North Elliott warehouse district. When the Alaskan Viaduct finally goes underground and they tear down the old ROW, it is going to cause a waterfront transformation all the way from the Occidental District up to Interbay.
The urban cruise terminals has brought new waves of tourism to Seattle Center, which it really needed.
But the taxes are getting stiff to support all of the initiatives they are trying to undertake.
Between sports taxes, transit taxes, high fuel taxes to support the ferries, it is getting a little tough in certain places to find reasonable housing.
One thing Seattle has going for it, they have great transit based zoning and have a clear picture on how urban permitting should operate. If you live within in certain proximity of the urban core, its really tough to get a garage built with your new domicile. (if you build new). To facilitate new business, they will waive a parking deck in some cases if you are rebuilding an existing establishment that has street access. If you want to build a new biz building, gotta have parking built into the plan or its a non-starter.
For example, when Marriott took advantage of some waterfront property across from one of the cruise terminals, the city made them build a subterranean garage for parking. No small item considering the property was less than 50 yards from the shore. Seepage remediation was expensive, but they did it.
I definitely think Jacksonville could learn a lot from Seattle on TOD and urban land planning.