I liked Nar Shadda quite a lot. It was inventive with the force puzzles, and gave you some good fun jumps and fights. With some reborn in there it would hvae been great.
Jedi Academy was great, yes, Bespin was okay. I liked the very first Jedi fight.
I think the first few levels would be great if you had the lightsabre. I might try them with cheats on to see.
Worst levels were the middle bits on board the doomgiver, I thought. They just lost the will to design levels well, placing enemies in places only jedis can get to, and just not thinkig as much as they do on other levels.