Northwest gem
While needing to stay in downtown Seattle, I recommend the Renaissance. When needing to stay near the airport, the Marriott Seattle Sea-Tac Airport is as good as it gets. 
I had a quick business trip today. I flew in from Sacramento. At the airport, I called the hotel to get instructions for the free shuttle. When I caught the shuttle, the driver called the front desk to tell them that I was on the shuttle and on my way to check-in.
Upon arrival, I was greeted by Yenny Kim, who had my hotel key waiting for me. The hotel is beautiful, felt like an oasis. Yenny was patient as I was trying to find my wallet among my luggage. She then showed me the way to the elevators; and helped me get situated by arranging for my Platinum gift. I could not get any better treatmet. 
I love this hotel. Like I said, it feels like an oasis. The corner room was amazing, the concierge lounge was welcoming. This is definitely a hotel I will be choosing when I am in the area again (which is quite often). Hats off to this hotel for employing great people who understand excellence in customer service.