I love this idea!
In my opinion I would love for you to start the game off as a Jedi Padawan training on Coruscant (I'm sick of Dantooine being the main Jedi sanctuary in these games!) at the Jedi Temple. Possibly for the same reason stated above (for the soul purpose of finding Revan and maybe the Exile also), I thought that was a good point to make out. Then, at level 15 you acquire the rank and title of Jedi Knight and can then select you very own (one) Padawan (either from your party or someone you meet once you visit the Temple again...who knows.) Then, when you reach level 30 (when your Padawan likewise reaches level 15 and becomes a Jedi Knight) you become a Jedi Master. This wouldn't necessarily put you on the Council. Jedi Master is simply the title given to Knights who have successfully trained a Padawan to Knighthood or those whom the Council decides is worthy enough of said title.
I think the certain classes such as Jedi Guardian, Jedi Sentinel, and Jedi Counsular be done away with and we finally go by the traditional rank and process of the Old Jedi Order (since that is what order we are under during these games.) Take all the certain classes' feats and throw them in together and you get to have your choice of any. Have so many choices to select from during each level-up as a Padawan, then this number slightly increases once you become a Knight, then it increases slightly more once you finally become a Jedi Master. I would like for the player character, once he becomes a Jedi Master, to finally be recognized as such. I hated being a Jedi Master in K2 and the other Masters never recognize me as such ... if they even recognized me as a Jedi (or even a person) at all. I'm beginning to get the feeling that the Jedi of this era were just as manipulative, deceptive, and as evil as the Sith in most cases. Like Atton said, atleast the Sith were honest with you. I feel it's time for this to be corrected and the Jedi in the games finally rise to the standard we have always held them to. Not arrogant and rude people that Atris and Vrook have made them out to be.
Oh, earlier someone mentioned that you player character in K3 help with rebuilding the Jedi Order. I say that let the Jedi Order already be rebuilt with Mical (Disciple) and Bastila on the Jedi High Council. We know that Mical will because when you play as a female in K2 Kreia says that he will sit on the new Council. I think Bastila deserves to be on it as well since she is experienced (having helped retrain Revan, fought Darth malak, and has tasted the Dark Side yet returned to the light.) She had more experience then some Master have when she was yet a Padawan. I feel that she finally deserves some recognition. I would also like to see some Rakatan Jedi and possibly an important Rakatan Jedi Master (preferably on the Jedi Council) in K3. I mean ... they were once force-sensitive, were trying to reintroduce the Force (midichlorians) back into their DNA (with my help), and wished to make their peace with the galaxy for what their ancestors did. I would like to see that my work in K1 - and their work over thousands of years - doesn't go unrewarded. Lets just say that they succeed and do come back to the galaxy at large and some redeem themselves by becomeing Jedi. What better way to achieve that accomplishment?
Well, these are just a few of my request. Whether they are contemplated on or not is a different story ... but atleast I voiced my opinion. Oh, and if someone is completely serious about their ideas, don't burn them for their suggestions unless you wholy expect it to someday come back to you three-fold. It's called Karma ... learn it.
Jedi Master Dakari
PS: Let's have a real white lightsaber in this one, please? The silver was a step forward (thank goodness) but it was a little too blue for my taste. but thanks for it anyway.