I think it's fair to say that Lelouch enjoys his theatrics as Zero.
Nice writeup Blue Mercy. I like the bit on overconfidence
I see Lelouch as this:
I think in the beginning he hated injustice but knew that people would have to endure. But when he saw that nothing would be done about his mother's death it began his want to change Brittania. He's fully triggered when he sees Brittania's massacre of Japanese and the military's carelessness in their actions.
And what's funny is that this actually provoked Lelouch, right before he got Geass. that one commander is about to execute Lelouch for no reason, C.C. steps in, and when Lelouch gets Geass and kills him, he knows he's finally going to go for his goal.