You can't say "Oh I like them all!" because there has GOT to be at least one theme you listen to
more than any other ones...
My favorites are:
1. The Throne Room and Finale (from the credits of Episode III... alot more majestic sounding and longer)
2. Han Solo and the Princess
3. Duel of the Fates ( I have yet to hear a bigger and less annoying sounding orchestrial arrangement similar to the Duel of the fates music briefly shown in Episode II where Anakin is looking for his mom.)