I was thinking in terms of people reacting more efficiently, suppressing greater/excessive emotion in favor of logical and tactical thinking. I'm just saying, the better trained/more experienced dolls would probably be able to fight without letting emotion interfere...or else, use their emotions to give them that extra edge. Entirely devoid of emotion, fighting on instinct...not an uncommon thing, and not an entirely great thing either. What if they're an enemy who doesn't give off a dangerous sort of feel? Whose intentions aren't immediately detectable, if at all? A mine isn't dangerous (well...), till somebody's stepped on it or moved it in a specific way...there have been characters I've known of who exude a peaceful feeling, and are completely serene as they popped people's heads off with metal wire. Some dolls, doll hunters, puppeteers are much like this. Of course, if you're paranoid/super cautious, then I'm sure you're fine.
Vesper, on the other hand, fails at a lot of this stuffs...he's got a lot of growing up to do. I plan for him to freak out a bit at small injuries, and majorly freak out/practically have a seizure over nail-related injuries.
Also...I never really thought about it...but yandere reminds me a little of dependent personality disorder...just a little.