The Attack of the Clones soundtrack is a mess with boring themes. The Imperial March should not have been used at all. Attack of the Clones is the only Star Wars soundtrack I don't own.
Revenge of the Sith's soundtrack could have used more cues and references from The Phantom Menace - Duel of the Fates and Anakin's Theme in particular. I probably like this soundtrack because it wasn't as bad as AOTC's.