Pretty much any effects added to the originals. Including the Ewok Celebration music. "Yub Nub" is the most amusing song ever. Luke's scream in EST. You know the one. "Only a sith deals in absolutes." How Anakin is always complaining about something. Falling into that lava pit was the best thing that ever happened to him. At least as Vader he keeps his whining to himself. Or maybe I just think that because it's hard to whine in that voice. I'm sure these have all been already said..