I think that one thing that would help to have more friendly debates would be to understand there is no such thing as single best thing *insert subject here*, because there are always nearly unlimited amount of variables, there are nearly unlimited amount of different best out there. So while your best is best for your variables, some other can have different variables and for him best is not the same.
But it is surprisingly hard to remember this simple fact of life, but to even know it helps to remember it at least some times and might help to give more refined perspective to debate on hand, which ever debate that will be.
That is my 2c at least, but we use eurocents (toymoney), so your 2c might differ
