I've known quite a few friends and some family with speech impediments (maybe there's something in the water), but they all seem to do much better when they are

I've known quite a few friends and some family with speech impediments (maybe there's something in the water), but they all seem to do much better when they are in their wheel-house. I guess that public speaking on topics you are comfortable with could be quite positive. One of my family members was able to remove it entirely, he became a chef and was required to shout orders a lot.