Don't focus on realism unless you really want to.
That said I get bored day by day and imagine what I would love to see in a roller coaster. What element patterns, what train movements. At my new job I take paperclips and bend them around when things are slow. Also if you see a hose layed out somewhere you can find some interesting patterns to try out.
My only suggestion is to do what you want and have fun. There is no need to do otherwise