Just Judo, and Recon training stuff. He dislikes grappling, and BJJ very much. To the point it makes him mad sometimes.
When I first started training and I told him I did Ju-Jitsu, he thought it was BJJ and well, he's almost predjuced against it. It took me over a year to be able to show him the blaringly apparent differences in the two arts!
I'm not as against grappling and BJJ as he, but I'm not into it or a fan of it.
I think his distaste for it comes from the knowledge that Army guys in Iraq have been using it, and coming back with broken legs, hips, backs and such due to the fact their trying to use it on concrete, stairs, hallways, and other such urban warfare environments, with full battle gear on, a 100lb. pack, riffle, and all the other gear getting in the way.
But that's fodder for another thread. Just explaining why he hates it so much.
Oh, a little tip on arm bars and such: manipulate the wrist as well, twisting up the arm, and you'll have more control over a stronger attacker. Plus, you'll break the wrist, elbow, and dislocate the shoulder with the same twisting and "barring" motion. And it's much harder to get out of for your opponent. Usually, they break their own arm.