There are very few who can pull off a good poser Image, I agree with orbital, most people use poser just like a Barbie but for computers.

Here is an example to illustrate.

http://www.renderosity.com/mod/gallery/index.php?image_id=1471386

At first glance is like wow look at that... but if you step back and look objectivly, there is this great oppertunity for a great action scene between Beast and Beauty.

Instead we have a Poser Model standing there holding sorts, with the expression that looks like she is constipated.

A very high percentage of Poser renders are like this, a Poser figure, with bunch of clothing, hair etc.. with a pose and than render and submit.   Facial Expression and a proper pose is very important and a lot of these just fall short.

Here is a good example:

http://www.renderosity.com/mod/gallery/index.php?image_id=1474268

In this one although we can see her face, this is a great action scene maybe a bit of motion blur in post would top it off... but this type of scene is better than the previous one.