The cons of pros and cons
Charles Kepner and Benjamin Tregoe wrote The New Rational Manager: An Updated Edition for a New World to describe the results of their research into effective decision-making, and doing it by pros and cons was an example of the way not to be effective. For a quick introduction, see a short article I wrote for the Northwest Entrepreneur Network.
That's not to deny the importance of Gary Klein's recognition-primed decision model (I'm still thinking about that), especially in those cases where time is of the utmost importance. Even then, rehearsing decisions in advance when you do have the time to try a more rational approach might be a good way to sharpen intuition and help make better decisions and avoid disastrous mistakes.