+1 to bonjour. Studious, some might say even craven avoidance of unnecessary conflict is my modus operandi. In the gravest extreme, however, when it comes down to protecting human life (the only time I will be willing to fight), there is no fair fighting and I would utilise whatever technology is needed and in hand to ensure I likewise was the one walking away.
But to cap that somewhat somber thought with a cheery one, it's unlikely that I'll ever allow myself into a situation where courtesy (even self-effacing courtesy) can't prevent an altercation as well as there not being an opportunity to escape the situation. (Some people have "their pride" to think of, not me!) But that isn't to say that the most extreme situations of senseless violence are not considered and prepared for.
An affable nature and the absence of blustery ego are some of your best self-defence tools, and what's more they are free and profitable in other areas of human interaction too! RDWHAHB!