A good game should not be measured by it's graphics, or storyline, but it should be measured on playability.
A game that you can pickup and play for 5 hours, or 5 minutes, is near perfect.

Jedi Knight 1 was the last great Star Wars game from lucasarts. Though of course Bioware didn't disappoint with KotOR either.
Jedi Knight 2 was such a huge disappointment. I guess for a elite force mod it was ok, but as a Jedi Knight game it was just so far below the original.
Tie Fighter of course is the best PC game ever made...
[edit for troublesome typo]

I think you're confused on a couple of points here:
1. Bioware did not make KotOR2, Obsidian did.
2. KotOR2 was a horrible abomination that was released in pre-alpha state, and was never finished. And LucasArts basically told their customers to fuck off. Which I then did. KotOR2 is the prime reason I refuse to buy anything from LucasArts anymore.
I don't think I'll agree that it's the best ever made, but it's a damned good game, I'll give you that.

Well if Team Gizka ever finishes the Sith Lords Restoration Project then KOTOR2 won't be the abomination you describe. Supposedly the reason it was so bad was at the end when Obsidian was under pressure from the publisher to finish the game. The SLRP is using a lot of the content in the CD/DVD that was put on the discs but never actually used in the game.

Yea, the end of that game sucked so much. You could totally tell they just quickly threw it all together.

Since their last update was on October 22nd 2007, I find that higly unlikely. Besides, it wasn't just the missing content, the game was bug-ridden as hell.
One of the worst bugs in every sence, was the racing jump bug. If you ever jumped across the finish line in a race, then in every subsequent race for the rest of the game, your car would simply float to the ceiling immediately when the race started, with no possibility of getting down. This meant that you couldn't get any of the speed pads, and was thus unable to ever win a race again. The jump was obviously implemented as a gravity flip, and some idiot programmer made sure that the gravity was flipped back to normal at the end of a jump, but not anywhere else. It would have been such an easy bug to fix, but did they fix it? No.
Here's a page with some of the bugs people have encountered.

I think the problem with that game being so buggy was the combination of the demand by consumers for the game and the demand by the publisher to profit from the game. If Obsidian had more time or resources or whatever else required to make the game run well then we wouldn't even be talking about the game being a bug-ridden product.
Personally, I think KOTOR2 could be used as a good lesson to gamers, developers, and publishers alike. It would teach patience to the gamers and publishers and efficieint time management by the developers. Of course I could be wrong but I'm sure there is a lesson hidden somewhere within the fiasco that was KOTOR2.

You know what adventure game I'd really love to see that probably no one else has fond memories of? Ripper, back when Take-2's big thing was epic adventures that were like movies. I also fondly remember The Black Dahlia. I'd love to get my hands on those!
EDIT:
Oh, I also forgot to mention that Christopher Walken was hilarious in Ripper, and it was amusing to see Paul Giamatti in an uncredited role as a doctor when his career wasn't as big as it is now (even though, funnily enough, I absolutely hate Paul Giamatti).

All I really care about is if they put Mass Effect and Dead Space up there.
Spore was probably the biggest waste of $50 I've spent in the past few years.

Hehe, that was a VERY unfortunate typo my friend ;-p
To return to the original topic of the thread, has anyone ever played Innocent Until Caught, or its sequel Guilty? I've only played the sequel (still have the disc and manual somewhere), but it was actually a really great point-n-click adventure game. It had added replay value due to the fact that you could choose to play as either of the two main characters. While they played through the same storyline and visited the same locations, they had to solve entirely different puzzles.