In the case of BG1 the said background is what happens with the charname along with the mystery that surrounds him. It is particularly cool that you can experience all the story yourself both embracing his ancestry and writing your own story. No wonder for me why so many people being attracted to him. There’s no need to force any cause for their company, since the charname himself is a cause enough.
This is what BG3 lacks imo. Mainchar is bland and practically non existent. He resembles more of an observer, while the first roles belong to his companions.
