I never expected to be pondering a rationalization for why a serial killer that kills serial killers (and other general baddies) could be in his own odd way a good and in fact decent person.
I think my favorite episode is still when Dex spotted the child predator scoping Astor at the grocery store and decides to take care of it.
"You fool! You've fallen victim to one of the classic blunders! The most famous of which is "Never get involved in a land war in Asia", but only slightly less well known is this - "Never go in against a Sicilian, when death is on the line!"