How about for something far simpler than just straight self defence. One thing that judo taught me was to fall properly when thrown or swept. Think about how many times in a fight a person gets hurt from falling in the tussle. As a judoka, that is one of the main parts of the training, and the most important. What good is being able to defend yourself with strikes if you are pushed down and you end up with a broken arm or worse a concussion. I think judo, or the throwing arts that is has spawned from make a great edition to ANY SD centred arts. But that is just my opinion.