With brothers you become friends. Some you hang out with more than others. You talk to one about the other a little more. You get mad at them. Then, you love them. Then, you apologize. You have to apologize whether you want to or not. You have to. That's your brother.
I was able to be more reckless and now I still make mistakes, but having kids, you have a responsibility and these little people who are looking up to you for everything.