I don't consider myself a planespotter, at least not to the degree where I concern myself with tracking tail numbers and such, but I do enjoy sitting at the end of a runway snapping photos of airliners on approach. However, I have found myself a little obsessed with a certain aircraft, which made a recent appearance here in Seattle.I have seen glimpses of this aircraft at various times through the years, usually seeing it sitting down on the tarmac of Boeing field while I drive by on I-5 at 65mph up above.