Hi Matthew,
I was thinking black and shade, although would definately be open to colour if it suited the design. As for styles, something abstract might be nice & this could keep the detail as simple as possible, compared to a more realist picture.I find myself having trouble thinking of designs, because I’m not a very good artist and get stuck thinking of literal depictions of things. The size could go up to about the size of my palm, otherwise a little bit smaller than that.
Thanks for your suggestion.