This was my first cruise anywhere and it won't be my last. I enjoyed that much.
My friends and I had flown into Seattle the night before from Tampa (and the time change was a definite shock to our systems). We had flown on AirTran and arrived at the airport in time for a security lockdown and had to wait for our baggage. We were lucky in we had booked private transportation (AirportDirectShuttle.com) from the airport to hotel, hotel to ship, and ship to airport. I would recommend them as a reasonable priced method of transportation in Seattle for cruisers.
We had a large group for this cruise, a combination of friends, and friend's family members. We meshed into a nice group in very short order when we all met at the Georgetown Inn, Seattle the morning of the cruise. The Georgetown Inn was fine, but it's location wasn't very convenient for seeing Seattle's sights before boarding the Vision.