I loved the game but I would have to say that I was a much bigger fan of the first KOTOR. The first KOTOR had that shocker in the ending that just made the whole game awesome. It had a great story. Looking back at KOTOR 2 albeit a great game it just didn't seem like there was a lot of story there. At least not a story which I cared about. Seemed like a lot of it was just a carbon copy from the first.
What I did like were the subtle hints from the first game.. Mandalore AKA Canderous Ordo, Admiral Carth Onasi, I thought they were cool subtle reminders of the first game. The whole game though I felt like I was waiting for something to happen and it seemed like it never did. Wow Kreia turned out to be a psycho evil bitch... like anybody didn't notice that right away when every lightside response you chose resulted in "influence lost: Kreia". It wasn't nearly the plot twist of... oh hey by the way you're the Dark Lord of the Sith.. SURPRISE!!!
Another thing I really like are the seemingly limitless possibilities of gameplay. In the original the whole light vs. dark thing was amazing. In this game they've taken that to a whole new level. I didn't even realize until after I finished the game for the first time that you can turn your whole team into Jedi/Sith. I had no fucking clue!!! And that's saying a lot considering I'm the kind of person that tries to do all of the sidequests and try to complete the game 100%. I kept waiting in the game for the Handmaiden to go Jedi but she never did, not until after I played through the first time did I realize there were several steps you had to make your partners force sensitive and I thought that added a whole new level of depth.
All in all a great game, hell if it were just a carbon copy of the first KOTOR with a slightly different story that in itself would make an awesome game so I can't complain.