I really felt sad, listening to the love theme in it's sorrowful style, "Anakin's Dream", especially the Schindler's List style viola solo overlaid on top.
I understand "Duel of the Fates" will be reprised for the Yoda Vs Sidious duel, which is why Anakin and Obi-Wan have a much more personal and emotional theme.
Of them all, "The Immolation Scene", "Anakin's Dark DeeRAB", "Anakin's Betrayal", and "The Birth of the Twins" are my favorite of the emotional tracks, not forgetting "Battle of the Heros", "Anakin Vs Obi-Wan", and "Enter, Lord Vader"
The Immolation Scene is especially powerful, considering i am sure this is the scene were Anakin kills all the Jedi KiRAB and storms the Jedi Temple.