Sorry, but BG2 had a "set hard cap".
Also, it's been stated numerous times by both the devs and the many many previews that you aren't Revan. It might be a good idea to read up on that.
A big reason to play a game for it's story over reading a book is the interactivity that the game can provide. Saying "if you want story just read a book!!1" really pisses me off.