I often hear from some that Anakin's turn to the dark side was rushed? I think it was perfectly handled and I don't think it was rushed whatsoever. You can see from The Phantom Menace that their are glimpses of what he is going to become, his lack of patience and his attachment to his mother is well pointed out by Yoda, this may seem like a minor personality flaw but it is a fatal flaw that will lead to his downfall. If the tusken slaughter in Attack of the Clones didn't convince the audience that he is capable of turning to the dark side than I don't know what would. Even in the hanger duel with Dooku he is not out for justice he is out for blood to avenge the death of his fellow jedi. Obi Wan had no intention of killing him but wanted answers and to bring him to justice and simply end the war which was not Anakin's objective. Throughout revenge of the sith he is portrayed as paranoid dreading that deja vu would happen to him all over again by losing Padme as he lost his mother. He kills Dooku with a small amount of remorse even though he knows it is wrong. He often voices his displeasure with the Jedi council over not being granted the rank of master, he has been given no reason to trust Master Windu or the other jedi so his turn as believable. Throughout the prequels we see Palpatine be far more reassuring to Anakin than any Jedi other than Obi-Wan. I want to know what more some wanted to show his transition from a likable selfless person to a ruthless villain, because to me it was handled fine!