"i dont want to lose you..."
in ESB, luke has a vision of han and leia in trouble. so he decides to leave his training and go off to confront a powerful sith lord in an effort to save them. obi-wan tells luke: "i dont want to lose you the same way i lost your vader" or something along those lines. luke asks: "what? am i just supposed to let them die?" and yoda says if he VALUES WHAT THEY FIGHT FOR, then yes.
based on this, i think its very possible that anakins final turn to the dark side happens when he disobeys the council-and obi-wan-to try to save a loved one. who would this person be? i dont think it takes a rocket scientist to figure it would be padme. i beleive in Episode III, dooku will capture padme as shes fighting against his army and anakin will turn to the dark side when he tries to free padme from dooku. anakin will free her, but at the cost of turning to the dark side. a bittersweet ending to episode III. thoughts?