There are endless options. Thousands of subjects to modeI, different eras. Different environments like industrial, urban or country side.I saw a lot of different and very inspiring scenes, either prototypes or models. So tempting.
I personally think it is really hard to choose a certain subject for a model railroad. There are many aspects to consider. The preferred era, environment, subject, available space prototype. What a hard task. Who would volunteer for such job? Well, it looks as I will.