Excellent game. I played it the second time not too long ago. I managed to do all of the things right that I should have done the first time. I managed to complete many of the subquests, and that made for a much better story and a lot more action. Great game. I would have liked to be able to max out on force abilities on both light and dark, but that might take the fun out.
I played it through two additional times to get most of the remaining subquests as well (Carth's son, Carth romance [female PC], Bastila romance light/dark [male PC -- just HAD to get Bastila to tell me she wanted to be my lover and apprentice, after all], Juhani slaver quest, and of course the Yuthura redemption quest which is really one of the nicest little surprises in the game).
If you have the PC version, there are some really fun mods available. Most of them overpower your character, but if you're replaying just to get quests you missed the first time, this isn't such a bad thing sometimes. There's a save game editor that's useful for hacking skills, for instance, which will save you from having to start over to accomplish certain tasks (for instance, I hacked a high Persuade on one of my "quest for the quests" runs because it was the only way I found to accomplish a couple of the sidequests the way I wanted). Plus, it's just silly fun the third time around to be able to just take Darth Malak to school at the end (go, tap your captive Jedi, punk, I'll be here when you get back to lay some more lightsaber smack on you, you Darkside puke).