In my first 6 months of kickboxing, I often thought of testing my skills - getting into fights to see if I could beat other people. I once told my trainer about this, and he said that even for him (he was the kickboxing champion of Moscow and 2nd place in Russia before he stopped competing) it makes no sense to pick fights. You never know how well-trained or equipped the other guy will be - he might have a gun, knife, or anything else. Thinking about that changed my whole outlook on fighting and I never even consider using physical force unless it is really required anymore.