Personally, I would never start my own discipline unless I saw something wrong with what I was currently/previously practicing. Or if I had a revelation that hasn't been commonly realized in todays Martial world (Like Bruce Lee had). Now don't get me wrong, I think everyone creates their own "style" after studing martial arts, or at least they should. But, ones style is different from ones discipline. Basically, I think it's a bad idea to just create a discipline seriously unless there's a good strong reason/philosophy behind it.