LOGIC: the potential harm and the potential good?

Let's take a theoretical mental framework for solving problems into practical reasoning. Living a life based more on logic means applying logic to everyday life experiences. How would this kind of life pan out, as opposed to a life lived on emotions, especially the effect of logic on rather inherently emotional "stuff" such as love? Worship of logic can be warranted, if tempered with good sense and given that there isn't "coldness" and lack of warmth people usually ociate with logic. I mean, we are humans, not robots so what would be the potential harm and potential good in a life carried out in such fashion?