Fantastic work on all of them, very well done!
I'd have to say that the Roadrunner catches my eye though I can't say why specifically. It may be the luggage rack. One doesn't see those done often and when they are done, they're not often done as well as yours. An odd thing to call out perhaps but I find that it's the odd subtle details which most people don't consciously notice that can make the biggest impression.
David G.