A martial art, that when practiced correctly, requires vigorous and brutal exercise, dedication, and physical well-being. It not only teaches a high concentration of kicks and blocks with a few hand attacks, but it focuses incredibly on respect, honor, sacrifice, honesty, compassion, focus, and many other philosophies that should be remembered every day. Taekwondo is a martial art that could eliminate most others not only because of it's technique, but the physical condition and mental well-being it requires.
I have practiced Taekwondo for years, and am physically and mentally well. I know how to fight, and also when to fight. My combat skills are surpassed only by my respect for my fellow men and women.