Well, I'm only gonna throw my 2 cents in for your first point Brandon. I personally think that Yoda was lying to Luke. It wouldn't be the first time. Of course, it depends on your frame of reference too. The Light side promotes life and harmony (balance in the Force). But when you look at what makes up the Dark side, you have power and destruction. And in a fight, that's what I would want. Fear, hate, anger are all powerful emotions and when controlled and focused on a target, they are hard to stop. Oh, and pansy-boy Luke was tapping into the Dark side when he was throwin' his little green Lightsaber around. Recall that duel a bit closer. It started out with just a few short swings traded back and forth, here and there while he was still focused on turning his father. THEN daddy felt "sister" and Luke went into an unfocused-blind RAGE, full of hate. At that moment, he hated the Emperor for all the crap in the universe, he hated Ben and Yoda for their deceit and treachery, he hated Vader for finding out about Leia, but most of all he hated himself for letting Vader find out, for letting himself be used like a pawn in the game between the Emperor and the Jedi. And it all came pooring out of the flood gates at once, all over poor Anakin. Then, that startling moment when he cut Vader's hand off and he was faced with the fact that he was truely his father's son. In an instant, he saw the parallels between himself and his father (the hand, the CAVE!). Luke regained his senses and threw down his Saber, determained to not follow in his father's footsteps any longer. He had almost become what he was trying to bring his father back from. Then he was back to being a weak Jedi again. And the Emperor began to strike. You know the rest. It's all about the power.