taekwondo is the decendant of hwarangdo, a very old MA which appears very flashy, but is actually a very effective combantant art. closely tied to CMA. to me, it's like TKD is hwarangdo with all the complexity watered down, the hand movments simplified, the weapons training cut, the internal aspect taken out, and much more linear. As bad as that sounds, TKD is probably among the most straight-foward MAs available, and i find the kicking i learned from it valuable. if you like upper-body power, kungfu is pretty good, as "flashy" as you may think it is. but if you think any complex move is flashy, stick to boxing styles.