I'm downloading Jade Empire first because, HELLO, martial arts!
Short reviews of KOTOR and KOTOR II:
KOTOR is brilliant, pretty much perfect in every way.
KOTOR II is awesome but you can tell someone was standing over them with a whip the entire time yelling at them to "get the game out NOW!" which makes for some rough spots. Still very worth playing.
And as the culmination of my Bioware kick, I am really really salivating over the upcoming release of Dragon Age.