Of course, we cannot forget the coffee. I've visited the Original Starbucks a couple of times, and it is pretty cool to see the logo in its original form, but I am more about finding independent coffee and tea shops, so I spent more time exploring than hanging out in Starbucks. I cannot stress how easy it is to get around Seattle - any type of food you want you can probably find, you can find here very easily.
Chicago (where I go to school) does have some good seafood, but living in Seattle is a whole new situation in terms of seafood. It is both excellent and widely available, and I love fish. A simple google search for Seattle food blogs will probably give you more detail than I can, but it really is a terrific city for food.