My only hope for KOTOR 2 is this, in the first you had the ability to be light or dark, I'm sure this is going to be in the second which is good, but, I want to be able to have my companions dark too (or light of course). I had thought in the first if I ended my team mates side stories badly that they eventually would go bad too, but no such luck.
Every team member should have at least two side quests which through the main character's advice can end good or bad, and if it ends badly that team members should sway with the main character to the dark side, such as Mission hating Griff, or Bastila shunning her mother. Not to mention more team members in the game, not that we should be able to have all at once but more options, like in the first if you chose not to have Juhani on your team there was no replacement! I didn't like that and conversely at a few points you should be able to get rid of team members, i.e. in KOTOR there's a point where Carth is told if he says one more word I'd kill him, he continues to talk and... nothing, so much for the dark side. I would just like to see the team more interactive with the main character.
On a side note, I hated the fact in KOTOR the more dark side points gained the face turned all gray, in the movies Palpatine was as dark as they come and his face is fine (yes in ROTJ it's different but they don't point out why and it's over 20 YEARS later), also Darth Tyranus, Maul, Malak, Bandon, even Vader's face are all fine (although Vader's was battle worn and in need of sun). I just kept thinking throughout the game, look at my face the how hell could I fool anyone into thinking I'm good, can't they SEE! Imagine Palpatine trying to fool the Jedi council an win the senate with his face looking like a baseball mit. Anyway that's my 2 cents.