I picked up KOTOR 1 and played through it about 3 times, trying all the options, and ending up loving the game, even though it had plenty of bugs. Same with the sequel, KOTOR2, the plot suprises and twists just like the first storyline and keeps you playing right until the end. There are still a few bugs, like the dantooine hanging bug, but hopefully that will get fixed.
I especially liked the forms and all the extra dialogue options which have influence over the other characters. As well as the breakdown and create items option that has been added. It usues a modified version of the KOTOR 1 engine, which works well bar the few bugs, and still can generate some quite nice visuals.
With so much replay value and a brilliant story, this is one of the best sequels to any game in the past 5 years. Highly Recommended to all pc gamers.