Granted I would have loved the game to contain longer or more in depth sidequests as in the case of the bounty hunter or smuggler quests, but alltogether I think KOTOR was nearly perfect in its length.
I still would have loved to make some dough with Mission's brother though.
Would I like to have a Morrowind with lightsabers? Sure, especially considering Galaxies seems to be a critical flop. Besides, there's always the future.