I liked the Biggs/Luke scene in the SW SE (although I wish they'd used the whole scene rather than an edited version)........and that's about it. It's the only addition that actually enhanced the film, IMO. All of the other changes either pissed me off, or were so subtle that I didn't notice them at all.
As far as the PT goes, I liked seeing Liam Neeson in TPM, though I feel his talents were totally wasted. I didn't really care for any of the music in the PT. It sounded uninspired to me (probably because it was- and who could blame him). There were so many great themes in the OT, and there was nothing really comparable in the PT. I can't say that I really enjoyed any of the saber-fights in the PT, either. They came across as being very fake and boring to me. I saw TPM twice, and AOTC and ROTS once each, and I can honestly say that I have no desire to see any of them again.