Thanks for any suggestions or constructive criticism,
Nolos.

How can you make the image better?  How about something to look at?  It is a woman's ass and a car, and a handgun.  What is the story?    The reflective side of the car takes up 50% of the image space, yet it reflects pavement.  If you want this composition, put something on that pavement for the car to reflect:  how about a body, or pool of blood, or a suitcase full of cash?  As it is, the most important elements by brightness and location are those rims and the ass, then the gun.    Tone down the rims, they aren't important.  Put something for the car to reflect.  It doesn't even have to be directly visible but only seen in reflectin.  Then why is that important?

I agreee that the composition ins't that great, but 1st things 1st, you need some SHADOWS....

2nd, the highest area of contrast in a picture will natually be a focal point, ie, the center of intrest. Your highest area of contrast is the chrome rim on black rubber. Tone down the rim reflect and zoom in to get more of the girl (and not some much car like muralist said) if that is where you want people to focus. (No way the rim is going to be that bright in a dark scene like you got goin on here)

3rd, I suggest looking up "the rule of 3rds" or "the golden rule" for art to get a better understanding of how to frame a scene. It would help!

But I do think Murlist has a valid point. The pic doesnt really tell a story. WHy is she barefoot with a gun, in a hot pink dress, next to a car, in the dark, ...etc, etc.............

1 : What is the focus of the scene, the car or the character ( or a dead body behind the character reflected by the car, just an idea ! ) ?

2  : Is there no shadows on your scene.

3 : The shader of the car look like a mirror, not normal.

Aside from the shader issues, what stands out (or doesn't) for me is the composition, there is nothing to draw you into the scene, everything is parallel with the picture surface, very rectangular. A slight angle on the car would lend depth to the scene, a contrasting angle on the wheel would add a dynamic too, a hastily parked car implies speed and action.
Also in terms of composition and the balance of light and shade, the wheel is too bright and the brake pads behind, really much too bright and clean. They only look like that in a showroom and look at the surface it's standing on, mud or dust from that would stick to it. Angling the wheel may bring it into shadow and detract from the brightness too.
 Shadows have already been mentioned, some are definitely needed especially under the car, as well as adding realism and atmosphere, shadows can be a significant part of the composition and in some ways should be thought of as almost as important in a scene as the objects that cast them. Like reflections they can also extend a scene beyond the range of the frame.

@Anthanasius, thanks for the shader set-ups I'll be trying them myself later

In addition to some of the above comments...The wheel is to bright. It pulls your eye towards the wheel. Never seen a brake caliper that is that reflective on the street Car shows, maybe. Dull down the caliper, even if you change the scene composition. You have a dark car, semi dark ground, then a chrome gun, car wheel and the caliper that over power the character and her clothes. 

On the technical side, Terradome defaults to 3 basic lights:
IBL
Point To
Specular

Point To lighting has depth shadows automatically enabled.  But you are using raytracing for your auto reflection which may explain the lack of shadows under the objects.  Double check your settings for all parameters and change to raytracing overall. 
Did you change the lighting positions?  This does not look like a typical Terradome lighting setup for this particular skydome image.  The wheel rim is too bright.  Anthanasius provided 2 excellent shaders you should consider using. 
Could you possibly post an image of your render settings?  That might need tweaking.  Also, have you considered using IDL with your scene?  Yes, it will increase your render time but it might solve some technical issues you are seeing. 

I do agree with the others, the render is too static and is not well balanced.  There is a lack of a focal point to keep the observer's eye from wandering.  Perhaps a body reflected on the car door, smoking exiting the gun's barrel, etc.  Use your imagination.  Look at the scene from different angles, go closeup, pick an area of interest to concentrate on.  I do find one thing interesting, she is left-handed (Are you a Southpaw?).  It would make forensic evidence easier to track down a left-handed shootist.

Until you have a composition - stuff in the scene - nothing else matters.  The image could be lighted perfectly, with perfect shadows and reflections, but it would be a bad image because what's there isn't interesting or well positioned.

Even just placing her shoes on the ground behind her so they would reflect in the car would be better than what's there.

An unrealistic pose seriously undermines the realism of a scene.

I suggest that the palm of the right hand should be flat on the car surface - people rarely rest their hand on the tips of the fingers in reality.

Similarly, it would be extremely unusual to rest the weight of a leg on the tip of the big toe.  Clearly this foot is not bearing weight from the hips, but even in this case it would be more natural to have the toes curl forward and touch the ground on the ball of the foot.

This will seem really nitty gritty, however, small things make or break the reality.  The gun hand should rotate out about 30 degrees as this is the natural or effortless pose.  It takes slight muscular strain to pull it in as shown.  If you want to convey tension, I would rotate slightly the other way and press the heal of the palm against the hip.

It may not fit the scene, but how about a prone body behind the character shown, off camera, but shown in reflection on the car side.  That would add some drama.

Lastly, there is clearly insufficient nudity.  Hike up the back of the hem at least.  A little wind, perhaps ...

Klebnor

Thanks for all the comments.

flibbits - In an earlier image, I had a pair of heels under the drivers side door but didn't like the way they were lying on the ground. I will check to make visible again. Funny you should mention shoes. Also, the door was open and reflecting the character.

I moved one of the lights because it seemed to me the image was too dark.

Will test some of the suggestions, all of them good. and repost.

Nolos.

For me:
The dress textures on the figure is less than stimulating.
The red brake drum instanly drwas my eyes attention (do you want that?)
The reflections in the car are overwhelming, it would also be cool to have the main focus point (or secondary focus point) in the reflections.

jmo