@SPhilli911 I can offer some feedback on a few:
First one: A good idea, and I think the scene lends itself to black and white, but the toning is a bit too flat for my tastes. I personally think you should have gotten slightly closer to the car, as it took me a moment to realize that the car was even there. The lens flare, while fun, contributes to both of those nitpicks I have.
I also would have placed the car a bit closer to the center as well, because it looks to me like the car was placed where it is for the sole purpose of following the rule of thirds.*
Second one: Solid action shot; complete separation between the 911 and the F430 really helps and the rumble strip forms a line that draws the eye across the frame from one car to the other. I don't know if that was intentional or not, but it really completes the shot. A slower shutter speed to show more motion would have been nice but I know that can be tricky to do.
All that said, this would have been much better in full color or full black and white, selective color is something I absolutely detest.*
Third one: Great use of wide-angle here, colors are nice and vibrant, the road leads off into the distance in a pleasing way, and the positioning of the cars is well done too. There's a very professional feel to this image, I can imagine a similar shot on a magazine cover.
Fifth one: The colors are very good here, and the birds in motion are a small detail I appreciate, separating this photo from many similar images I've seen before. The vignetting is a little distracting though.
Overall, there's some really solid stuff here. I hope what I've said is helpful and can provide some ideas for future work.
*Please don't take offense to those two points, it's nothing personal or anything, just two choices I see very frequently that are distinctly amateurish in my eyes. People should, of course, be allowed to experiment and try new things, but those who never move past clichés such as these will be limited by them.