I must ask what program do you use and what material you put on the model when rendered. It looks absolutely fantastic and I would love to showcase some of my models the way you do...absolutely stunning work.
Hmmm I love the heart of a machine and often Military objects are the most attractive. More heavily engineered and packed full of working parts. A day inside the bowels of warship is just as interesting as a day in major gallery.
Sup dude.