Very nice, all of them. I have a few recomendations for improvements on your Airwolf MOC, being a big fan of the show and building an Airwolf MOC myself. Make the roters 2 bladed insted of 4 and make them white. Also make the botom of the tail white, other than that it's perfict.
I understand what you mean, when you post on my camper..., your looks more like the VW Transporter T3 ;). I like the truck, the colors are beautifull, the blue/white is a good idea, & I already do a 4 wide Golf II, I just have to post her, if you want, I can do a building instructions; ps: I want to create a building instructions folder, about all my creations :D see ya!
I like the helicopter and the sportscar. If you need any advice or tips for photography, don't hesitate to ask any MOCers that take good pictures, as most of them will be glad to give you some help. The first thing I'd recommend is getting a piece of posterboard to use as a background.