I loved it.Part of what I love about Lost is the questions, so even now, in the final season, when we get more questions, I, for one, enjoy it, because even the questions are answers.
I agree that we do not know who is good and who is evil. I don't know that it breaks down that way, either, so honestly I think that trying to slap a label of "good" or "evil" on anyone is futile and not the point.
Tummy, Breezy, I agree with you that part of my current stance is that I want a better story than, guy in white is good, guy in black is evil. That's. . . just not interesting.
I think that we make a lot of assumptions about which character to believe based on pre-existing beliefs about that character. Why do we believe the "plunge the dagger in, don't let him talk, he's evil incarnate" when Jacob (via Dogen) tells Sayid to kill MiB, but we do NOT believe it when MiB gives identical directions to Richard to kill Jacob? Is it because Jacob wears white? Because we've "known" Jacob longer? Because we heard it from Jacob first?
When Isabella appeared to Richard on the Black Rock, her references to "the devil" were intentionally vague. We're meant to assume she was talking about the smoke monster, but all she said was "the devil" and "have you met him" and we, and Richard, assume smokey, but she could have as easily been referring to Jacob.
I do not think it is a coincidence that Isabella appeared the very moment Richard renounced Jacob and dug up her buried cross. Which MiB returned to him in the first place.
I know how it was written and played, and how we're lead to believe that when Jacob explained the wine bottle with the island as the cork, that we assume that the wine is evil Smokey, and the cork/island is keeping evil at bay. That, too, is intentionally vague.
My thought? What if Jacob is the one being "contained" on the island, and it's MiB's job to keep him there? If Jacob is dead, or defeated, then MiB can leave, earning his freedom. If MiB is indeed a security system, then his killing of people coming to the island could be seen as limiting the number of people who could potentially take Jacob's place.
I believe that it's all been intentionally vague for a reason. I still feel a twist coming.