Recently I've gotten all "loco loco", as said by Lordician, and I've been trying to make various locomotives and rolling stock for them. I've actually made some good progress, with three actual locomotives and freight trucks/cars, and some narrow gauge engines with their own rolling stock ('6 standard gauge, '4 narrow gauge). However, I've been at a loss on exactly what to replicate, or what to be inspired by. I've tried to avoid building Diesel Multiple Units or electric locos, and I'd like some ideas for diesel locomotives and steam locomotives.