If, in what you're doing, whatever image you want to create, you want to go for realism then go for realism. If you want more of a fantasy look, go in that direction. There's no reason to confine yourself to attempting realism or not even trying with every image just because you use Poser or any other 3d program.

In other words, do what you want and to hell with what someone else thinks of it.

...... Kendra