Prequel:Would try to get Jedi training,fight in the Clone Wars,warn the Jedi and Anakin and Obi-Wan about Palpatine.
Kotor:Would want to travel with the crew,but first would go to Kamino 10 years earlier to try and start a Clone Army,and give the Kaminoans all the plans the Prequel Kaminoans had for the clones and their weapons and ships,that way I could fight Malak with an entire army and more advanced technology than even he has.
Empire:Would infiltrate the Death Star,recue Leia,and steal Vader's Tie advanced,then try to destor the Death Star.Or try to save Vader/Anakin after the Emperor died.
NJO:Would try to prevent Anakin Solo's death,don't know what I'd do after that.