I have to agree with what some posts are saying about certain martial arts effecting your later training in BBT. I have seen a few people come into our Dojo from systems such as TKD, Karate, Boxing etc.. and most times (not all) it is hard for them to break certain habits they attained from these previous systems.
I think martial arts can described like learning languages. You will always have your first language, but when you learn a new one, it will be hard to pronounce it properly due to the speaking habits of the first one. Therefore you develop accents. Same with the martial arts. (Not always the case however).
In my situation, after studying Bujinkan for a while (which I still do) I started learning from other systems as well. I currently cross train in Pekiti-Tirsia Kali, Arnis/Escrima, Silat and most recently shoot fighting. I take what I learned from my first language (Bujinkan ) and apply it to these new ones in hopes of become a little more flavorfull in my developments of becoming a better fighter.
BBT gave me a good basis on flow and relaxation, which in turn helped me excel further in these other arts.
I know from experience that I am going to get bashed because I am a Bujinkan member and I am cross training in multiple martial arts. According some people I have talked to, "Bujinkan is all you need." Not all of them however. But hey its what I like to do.
He who comes to destroy, shall he himself be destroyed - Burned to the ground - And the Pitbulls never look back!
Colin Tranborg
PTK Saskatchewan Pitbulls.