I think we should have more thinking animations like:
think_rubchin_evil (for someone who’s plotting something)
think_rubchin_happy (for when you think of a good idea)
think_rubchin_confused (example: when you don’t understand something in school)
think_rubchin_serious (example: for detectives)
think_rubchin_worried
think_rubchin_angry
think_rubchin_sit
And along with those the talking versions
Know what I mean? 
