I think this is a very important detail you must consider in taking toy photos. You would want to make them look real. I sometimes do the pose in front of a mirror to see if it would look realistic and not awkward… though, me doing it looks really awkward. :p
Check out anime/manga characters for their signature pose or how they normally do their moves.
I used a textured paper and a lamp here with Revoltech Jigen of Lupin the Third.
Running pose of Evangelion’s EVA-02 Robot Spirits of Bandai with a Brown Cartolina paper background. This one got very good articulation, lots of hands and accessories.