Well, if we are going to go multi-vote, I also like the rythm of General Grievious's theme, and of course Darth Vador and Obiwan Kenobi's (classics).

As for my 'favourite' passages, I like the emotional intensity when Anakin tries to rescue his mother in Episode II, but fails and start turning to the dark side of the force. I cry everytime I see him explain the scene to Padme.