Little bits of nothing

I'm watching for the umpteenth time the Star Wars episode "The Revenge of the Sith". Yes, I'm a Star Wars fan, I belong to the generation that grew up with R2 D2, Luke Skywalker and (oh boy) Han Solo.
The more I watch it, the more I find myself analyzing those characters that were probably meant to be one-dimensional, specially if you just rely on the acting.
Let's take Darth Vader for instance, or Anakin Skywalker as he was known before he joined "the dark side". In the movie they mainly show him as a soon-to-be malevolent character that had the genetic make-up for being evil. Yet, as I watched the movie over and over again, I started thinking that he was forced into becoming the bad guy. I mean, he had all this power but yet was never trusted by the good guys. So it goes back to the nature vs nurture dilemma: if he had been shown trust, would he have turned his back on those that were meant to be good? He was let down by the people that he loved and respected. Granted he seemed to be weak, and I'm not talking about how bad he acted, although he did, but if a weak personality is not influenced and nurtured by the "right" people, what can be expected?
I know that for those that do not know the characters and/or the movie I'm making no sense, but really, as cheesy as this saga seems to be, I find that when analyzing it, it carries a lot more insight into the human psyche. And seriously, it can be eerie.