The question was posted long ago but it's still interesting. Different styles probably have different views on bouncing. I train Shotokan Karate and one instructor we had visiting to help out with gradings last time sad that (in competitions) back in the 80's just about everybody was standing still, but it has changed over time. Today most people in competitions are bouncing, faking, moving more and trying to trick the opponent. So today you have to stay more mobile than 30 years ago. But then I'm just talking about competitional Shotokan Karate. In other styles and in self defence it may be better to stay away from bouncing. That is my humble opinion.
