Anakin ultimately turned to the dark side because he, unlike the other Jedi, learned to love at a young age, which later led to him falling for Padme. Despite his best efforts in AotC to convince Padme otherwise, he really was breaking the code of the Jedi -- don't love some people more than others, it'll only interfere. It's a lot like being a priest. Now, in RotS, Obi-Wan made it very clear to Yoda that he would not fight Anakin, that he was a brother, and he'd basically rather die at the hands of Palpatine than have to fight his brother. I obviously understand that Anakin and Padme had a sexual attraction while Anakin and Obi-Wan had a brotherly attraction, but regardless what kind of love it is being shared, isn't this still a conflict of interest? Isn't this what the Council didn't want their Jedi to have -- love that would change one's viewpoint on what to do? Obi-Wan did fight Anakin anyway, but he even made it clear at the end for Anakin not to make the dumb move that would lose him the battle. Was Obi-Wan breaking the Jedi Code by having that strong conflict of interest between his job and his desire?