Anakin Skywalker was evil from the beginning

[ItachiZaku]

In all fairness, the Jedi stood for order, so logically they would perceive 'bringing balance to the Force' as removing the element of chaos and entropy represented by the Force, as they see the Sith as the destabilizing element that threatens the balance.

Which would make the Jedi evil. If the Sith pretty much want to control, there wouldn't be a real problem with most control, as we are all controled by our republican overlords anyways (USA here), whereas the Jedi want to eradicate the Sith.

[SodiumChloride]

The "black and white" morality of the original series only works if you don't think too hard about it.

[Darth Belichick]

First 3 movies should have been more about Anakin's downfall and less about the republic being taken over, it would have made for a more compelling story. Yes you obviously need to show Palpatine's rise to power, but I would have preferred to see more Obiwan and Anakin kicking ass and just more character development in general. Also, anyone but George Lucas directing and people rewriting the script for better dialog would help.