Weight was a motivation, as an American teenager I'm able to go obese if I'm not careful. (Hey it's our culture ) So while I'm not "fat" I'm a little on the chubby side, so that was one main reason. Another would be because I needed an extra activity to do. Otherwise I would be 100% computer geek. One last one is the knowledge of self-defense, and the other skills I'm taught. It's good to know how to defend yourself, even if it's not physically. I think Martial Arts can give a boost in confidence. Not only that, but learning to be more controlling of yourself, and sharpening those skills, oh say: Courtesy, Integrity, Perseverence, Self Control, Indomitable spirit. I've stayed in Tae-Kwon-Do this long, so it must be motivational enough.