They should make it so that if you hit certain characters too many times with a net they'll sock you and you wake up back home with a black eye.
They should also allow character personalities to cross gender lines (e.g. have a few snooty males or cranky females)
Criminals. Once in a while have a critter engage in criminal behavior. If you can gather evidence (e.g. snapshot of criminal committing crime - put him/her on trial and send em to jail)