Originally Posted by Anno_Domini
Indeed. With Talia, it was all about revenge and to her luck, she knew a man and an army that would die for a cause.
And that's even less interesting
At least Ra's wanted something that could "potentially" be for the good of mankind. Those kind of moral gray areas are what make a villain three-dimensional. "I want revenge because you killed my father" is about as not-three-dimensional as you can get.