Designs, especially for your display, depend on how you paint.

Obviously if you only stencil your designs must be what you have stencils for, but if you you “free hand” you have to consider what to show.
In my experience working with freehand and stencil artists, and myself being a freehand artist, I find I need only a few eye catching designs for a large display, a large sample book to let them see a range of skill and to give them ideas, and then a smart phone or computer to surf the web for what they want.
We have to face it, we either roll out stock designs, or we do the custom order.