They're aggressive? Awesome. But bad for kids.
If you have brothers and stuff, you know it'll be sort of like that. Only they'll be taking over your everything. Stealing your food, bringing you presents like pretend food, playing on your video games, messing with your electrics, deleting people's numbers on your phone, sending picture messages (my daughter sent a pic of herself to my sis' friend's boss who didn't know the friend had her number, LOL. Luckily she didn't realize who'd sent it) things like that.
I think it's good to get kids into martial arts. My father is a black belt in karate, but I never went and studied under him or anything. I did it for a short while, but couldn't do it any more (it moved) so never continued.
The discipline and stuff is awesome!
I hope my kids look up to me
They do love me and harass me for attention a lot, lol. Very sweet.