Emotional Decision Making or Vulcan Logic?

After watching the movie Star Trek when it came out, I wished I could make decisions like Spoc: purely based on logic. Vulcans don't let their emotions cloud their decision making and can analyze the facts and make the best choice. So when a vulcan is faced with 175 different salad dressings at the supermaket, he will pick the best one factoring in price, quality, taste etc. Spoc would know which one would lead to the most utility not letting his emotions get in the way. Right?

WRONG.

Truth is, we would not be able to make good decisions without our emotions. We don't have the concious mental capacity to take in all the facts and weigh it out. If we had no emotions we would be stiffeled in each choice that comes our way.

"Neuroscientist Antonio Damasio studied people who had received brain injuries that had had one specific effect: to damage that part of the brain where emotions are generated. In all other respects they seemed normal - they just lost the ability to feel emotions.

The interesting thing he found was that their ability to make decisions was seriously impaired. They could logically describe what they should be doing, in practice they found it very difficult to make decisions about where to live, what to eat, etc."

From changingminds.org