Anakin’s theme is a good piece of music but it shouldn’t exist in its current form. It’s childish and Anakin should never have been portrayed as a child, so it’s hard to appreciate fully (not to mention he practically drops it in II and III).
Duel of the Fates is monumental and a perfect example of the film not being good enough for the music (or big enough). If I listened to the soundtrack first, I would have expected something much different.