Animated Character Designs

I sometimes fancy myself a cartoonist, and being off of work all week with a bum knee I decided to pick up the pencil.
http://s470.photobucket.com/albums/rr61/St_Mopar/Animated/?action=view¤t=ssludge.jpg
http://s470.photobucket.com/albums/rr61/St_Mopar/Animated/?action=view¤t=skup.jpg
Kup looks weird because of how I resized. The chins are lacking, but I'm working on both a Sunstreaker and Mirage that will more then make up for the lack of chins. I always need ideas, so any input will help. Thanks for looking and lemme know what you think.
http://s470.photobucket.com/albums/rr61/St_Mopar/Animated/?action=view¤t=ssludge.jpg
http://s470.photobucket.com/albums/rr61/St_Mopar/Animated/?action=view¤t=skup.jpg
Kup looks weird because of how I resized. The chins are lacking, but I'm working on both a Sunstreaker and Mirage that will more then make up for the lack of chins. I always need ideas, so any input will help. Thanks for looking and lemme know what you think.