I totally understand you :) - I have always the same 'problem' of expressing my thoughts in a convincing manner. I am mostly overruled by the loud people - that's why i stay quiet and then later I am disappointed that I could not express my point of view clearly. I really love good conversations but i understood that i'm not made to discuss with a lot of people. It works for me with one or two persons in a quiet manner where everybody is listening to what the others want to say. Then there is a process of improving each other with respect.