You did it because it was the right thing to do, yeah? And it was. Followed the rules, and he would have died.

I don't follow the rules either, but I am not a do-gooder. That is not to say that I never do good, and there are people who benefit from what I do, at home. But I am not a noble figure, at the end of the day. It is a nasty fucking business that I work in, filled to the brim with people willing to do nasty fucking things, and I'm one of 'em.

[It's not self-hatred or guilt that motivates him to say this - no I'm a bad guy, and everyone should hate me because I don't deserve any better. On the contrary, he sounds incredibly matter-of-fact.]