Converted from RAW
Curves/Levels/Brightness
Cropped
Moved to PsCC
Viveza (2/3 X's)
DeFine
SEP2
Color Efex
Resized
DeFine
Resized
USM
Resized
Saved for WEB
Statistics
Place: 18 out of 39 Avg (all users): 5.9605 Avg (commenters): 6.8000 Avg (participants): 5.2857 Avg (non-participants): 6.2182 Views since voting: 484 Views during voting: 195 Votes: 76 Comments: 6 Favorites: 1 (view)
A wonderful subject for the challenge, well composed and definitely suitable to the square crop. The composition is really well balanced with spires to the left and right and the castle providing the perfect backdrop. Lines from the tracks and the background tableau lead nicely to the foreground subject. The tonal values are good (a bit dark in the shadows and a bit over-saturated for my taste).
What really stops this from being more appealing for me is the overall busyness of the midline background. I know there's no way to avoid people at Disney World, but in this case the background directly behind the car and its passengers keeps the main subject from really standing out. I keep looking at the headlights and the tires, because they are more isolated from the background. It seems from your notes that you know your way around some good post-processing tools - you might consider looking at some selective exposure control to help make the main subject pop out of the background. A Camera Raw radial filter on the car or a overall exposure reduction with a Viveza control point to brighten the car might be an interesting option.
All that said, I like the image a lot. My suggestions are based only on that one minor issue I see - a wish to isolate the subject from the busy background at mid-frame. Excellent work overall - especially in the context of the challenge.