god you know people who proclaim themselves to be hyper rational and logical? and think that they don't let emotions get in the way of the right decision? those people or wildly misunderstanding the fundamental purpose of emotions. without the utmost basic emotional responses (advantageous and adverse) you literally wouldn't be able to understand or make positive and negative connections with things/events. you literally wouldn't be able to tell whether or not getting stabbed is good or bad. you HAVE to feel the bare minimum to make decisions. without emotions you cant figure out which consequences are advantageous or adverse.
@cquad Wow kiddo - I couldn'ta put it better myself. There do exist people who, as a result of stroke-induced brain damage, _don't_ experience emotions … your prediction about how this affects them is 100% true. They can't make decisions, nothing has affective valence. Or as David Hume put it, "Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them."