Relying soley on emotions as a process for decision making has both positive and negative aspects.
The positive aspects of such a mindset include the relatively low amount of psychological suppression involved in decision making. What I mean is the feelings that your emotions spark are natural wants, that is, they are natural responses akin to what any other animal would experience. Such primal (and I don't use the word primal to insult this method) thinking means those thoughts are not suppressed. If you know anything about Taoist beliefs, its tenets are comparative to the spontaneity that emotional dependence would bring an individual.
The fact that these are indeed primal thoughts also form the negative aspect of such thinking. The majority of us repress alot of emotional desires because of the advancements of our society, so those who dont tend to stick out and may face social antagonizing. For example, if I tried to kiss every girl I've ever wanted to kiss whenever I wanted to, well I don't think I have to say it would have negative results!
Emotional knowledge definately has a purpose in our lives, but soley relying on it, in the 21st century, would not be a safe bet for a healthy lifestyle.
I agree with above. The taoists and many indigenous people are much more in tune with their emotions and what they reveal.
In the industrialized/commercial nations, however, the plethora of distractions make this much more difficult. Most are out of touch with their emotions.