Actually, I’m not. I am, however, a big Bumblebee fan (he’s my favorite Transformers character), so I thought I’d have fun with that and a little “fourth wall breaking”.
I’m trying something new here, and leaving the open mouths uncolored. Frankly, I just don’t like the dark coloring for the inside of the mouths (which tends to be dark), at least in this style. It just never worked for me.