Nice! I just watched a character design class on SVS (forget the actual name, but it was taught by Will Terry and Jake Parker), and in it, Jake stressed using 3/4 view a lot with character design, as that allows you to see most of the character and get a good read on them. For those two poses you're having trouble with, they are both head-on view -- what if you tried them 3/4 and see if that helps?