Qwest Field is not the only great stadium in Seattle. It's neighbor is even greater in the opinion of many: Safeco Field
My favorite of the new baseball parks, I think it is sorely neglected when discussions of best stadium come up. Its the retractable roof that really gets out of the way, in addition to fitting with setting, being a great pitcher's park and doing a great job of adding character.
As I said, the design really fits into the city. When I think of Seattle, I think of brick lofts, the ocean port, modern. The ballpark fits all of these in its facade. Even the lights are reminiscent of the port cranes nearby
One thing that really works for Safeco is how open it feels with the roof open. I can't think of another retractable roof stadium that doesn't feel like one. Of course there's the huge reminder in right field, but that's leaves 3 of the 4 sides out in the open. This could be the result of not trying to be indoors, but rather under a true roof
When the roof is closed the outfield still has an airy feel, while the infield seats feel more indoors.