WARNING, SOMEWHAT SPOILERISH:
I think I'm inclined to agree with AlanSchu here, my definition of a chosen one doesn't seem to be quite yours. I don't feel that you need some kind of prophecy or big god telling you what you will do for the rest of your existence to be a "chosen one". I guess my defenition is that a "chosen one" is someone with more power than a "standard character" would have. Another point is how everything seems to revolve around you all the time, you are'nt a keyplayer in the game, you practically are the game itself. Almost nothing happens without you having been present. One example is BG you are the offspring of a dead god, giving you a great destiny and power from the start. In JE you are the last of the spiritmonks, the only capable of destroying the evil in the land. KOTORS character always comes off as a giant twink, former warlord that controlled several fleets, badass in using lightsabers and obscenly strong with forcepowers.