1.) a story as good as the Kotor I story
2.) Hk-47 and i want that unsolved quest with the droid factory solved
3.) The ebon hawk and: Bastila as well as Jolee (if he is still alive but why shouldnt he)
4.) Upgraded Combat system: new animations, different animations for different styles,
5.) the possibilty to be a gray jedi, someone who mastered both sides of the Force and decides to use both of them (like Revan or Jolee)
6.) A duel mini game like that one on Taris, for jedi
7.) More interesting feats and force powers, your party members should have all unique abilities (like in Kotor II but more) so they are actually very useful
8.) and much much more..