Welcome! One of the other mods will be along shortly to move this to the General Forum since I can't access that menu from work. Automotive photography is a VERY challenging discipline; far more so than most people realize. You're off to a good start, and I would say that your'e in a great position to get really good at this. For future reference, it helps greatly if you number your images, and limit your posts to a maximum of for per thread.
C&C per req:
1. The location is great, but I'm not sure that this composition is really optimal. I can't check EXIF data right now, but I'm assuming you shot with a small aperture, wide lens and/or small-sensored camera based on the DoF. In order to make the cars more the focus of the scene, use a long lens and/or larger aperture to render the background unfocused.
2. Better composition, but distracting background. The eye is attracted to light, and the hills in the background cause a "fight" for attention with the cars. Try for relatively even, homogenous backgrounds to avoid distraction. This is a case where at least a reflector, or better yet, a couple of strobes would have helped greatly to eliminate the deep shadow around the wheels of the yellow car nd grill of the white. Again, too much DoF.
3. Good rear 3/4 view, but the unfocused flowers in the foreground kill it for me. As per #2, additional light was needed around the wheels and under the rear bumper here. Also avoid (when possible) split foregrounds like the concrete and grass. They eye naturally follows lines; in this case right out of the frame.
4. Good idea, nice background ('though I would have tried to have a better arrangement of golf carts) and ideal DoF. Again, reflectors were needed to bring more illumination down onto the tire areas of both cars, and I think that moving forward slightly to eliminate the dark area caused by the wiper recess on the foreground car would have helped.
5. Poor light, distracting background, and nasty reflections... pretty much all of the "wrongs" you could get in one shot!
First of all, you HAVE to get a polarizing filter to kill the reflections off of the windows, then find a better background (this one really is as about as bad as it can get) and then get some more light one the scene. Especially wheel areas and front clip.
Yes, I know there's a lot of seemingly negative points above, but really, these aren't too bad, I'm just nitpicky. If you're going to keep doing this, then you have to invest in a polarizing filter, a couple of big (as in 48x72) reflectors, a couple of big diffusers, and several strobes w/ remote triggers. First and foremost is the polarizer.
Just my $00.02 worth - your mileage may vary.
~John
