What I don't like is society's obligation that you talk whenever you're spoken to. Sometimes I don't have my talking circuits engaged, okay?? Leave me alone until I do. But I have an OCD friend who needs a verbal response to EVERYTHING he says, even if that means I have to say "Ya" 8 times in a row! He won't accept a nod; it has to be verbal. So, to keep my sanity, sometimes I refuse to acknowledge his repeated words, choosing rather to answer every OTHER question or prodding "Right?", rather than every, single, redundant, one.