The light at sunset can make for some of the most pleasing shots and I did used to take the time to go to Burien when SEA was on a northerly flow to get some of the heavies departing in the best light. Once the sun goes down, it is tempting to head home but I would hang around a bit longer. The blue hour could make for some pleasing shots too and even when it was getting pretty dark, the amazing low light performance of a modern camera meant you could get something different. Combine that with the super noise reduction capabilities of current processing software and you can achieve shots that would have been impossible a few years ago.