Out of the first four I like the first the best. It gives the most depth without getting to dark that you can't make parts out. Also the colors level on it just fits best to me .

The yoda signature turned out nice, it's a little bright but other than that it's good.

Your last is most professional to me. Colors are good and the text is placed well. Great brushing on the car also but I think you should have blended it over to the right just a little bit more. Anyway it turned out real nice.

Great work on all of them!