It is a great picture! Yeah, she usually does look a little more bouncy-ish, but you always have to make the happy characters look serious sometimes..otherwise, they would annoy the crap out of us! :D

hey thats a really good drawing of tenma chan although i've never really seen her with that expression. cause she's usually smiley and abit doughy looking (well thats how my friend describes thse types of characters :P)