Dantooine appealed to me in the sense that the graphics there shined forth as being very real-looking. Meeting Master Vrook always provides pleasure.
"Always a pleasure, Vrook. I see you still have your cheerful disposition." -Exile
On the negative side, I thought the kath hounds could have been given a more original name. Think of all the "kaths" we've had lately: Cathar, Selkath, Kath Hounds, not to mention Karath. While fun, I believe we could have done without the side story about the woman who lost her droid. Otherwise, Dantooine contains enormous amounts of fun.
In terms of graphics, music, and epic detail, Manaan stood out. The murder case was an interesting addition to Star Wars, and the underwater adventure, while slow, possessed wonders to behold.
Unknown World of the Rakata was intriguing mainly due to your finding out about the first really advanced race of people from the Star Wars galaxy. I cherish the action and the music inside the stone temple, as well as your confrontation with Bastila.