Just a personal preference, but it somewhat bothers me that in their robot forms I really can't tell which console is supposed to be which. To me (apologies, getting a little geeky here) it is the difference between the original Transformers designs:

...and the ones LucasFilm did for the new movie:

Notice how in the first one you can tell that it is a truck robot, big clean forms, recognizable colors and volumes. In the second its just a robot with lots of little bitty parts and forms that are pretty hard to read. To me your designs are more in the vein of the second design, than the first, and I see this as a weakness.
Anyways, not that I expect you to go through and redo these things that you've obviously invested a lot of time in, just some thoughts for your future designs!