There's something about the raw horsepower of machines of this type. They don't go fast, but they're the closest thing to an irresistible force I can think of. And there's the hybrid nature of using the diesel to drive an generator to drive the electric systems that drive the wheels. My Prius is a hybrid, but nothing like this. The D-E is probably the most powerful and efficient railroad engine every built.
You might think them ugly, but I think they're beautiful and well engineered.
I caught these three over a two day period parked on a track just outside of Dupont, within walking distance from my hotel. The trains gave me a destination while out walking in the afternoons when I was done for the day at JBLM. I'd carry my E-M5 with me and experiment with various compositions. So far the photos worth showing are pretty mundane with regard to composition. But I don't care. I like them and that's all that really matters. Perhaps I'll go back and play around with the files some more in post.