Yes, mastering all the Martial Arts you have learned, or being able to defend yourself with techniques from all the styles you have learned? I think I would, no I definetly would rather know how to defend myself, even if I have not mastered all the arts I have taken. Really, being knowledgable in a variety of Martial Arts is not a bad thing, and I am not trying to say that it is. It is good to be "well rounded" when it comes to Martial Arts, but be realistic with yourself, if you were to be attacked on the street, would you just use your primary art? I wouldn't think so, but maybe you would. If I were to be attacked on the street I would be mixing everything I have learned to get that person away from me.