I'm actually not opposed to being a sidekick for the origin characters, but I'm very much imposed to my custom Tav being some magical construct created on the naut with no story beyond FAKE dialog tags. (Fake as in you can say something, but the game doesn't *include* the Tav in the history of the world. Tav doesn't exist before we take control of the body of our Tav on the ship.)

I can't even write my own made up background, because I have to CHOOSE a background in the game and until some wiki or site writes down a list of what dialog is triggered by the background, I can't be sure my avatar isn't suddenly claiming to be from baldur's Gate or that he is Elminsters love child with mystra, because the background just doesn't specify what "tags" get applied.