to me, the snake is the nicest one
I like car photography (well, basically that's all I do) and even tho your pictures do look great they, somehow, lack abit of identity. they look like other car shots one can find around on the internet.
of course, it's very difficult to do something original, and we all have to copy first in order to create then.
The quality is definately here, but as for car photos, abit more creativity would be better. Maybe that's most people (me included) problems in car photo.