I'd be more interested in Origins if they played like, in some way, the Witcher plays, just less. Yeah, have the player decide some major things, but otherwise let the characters act as they would and watch their stories unfold.
I guess the system lends itself to people who are for the one and done approach, i myself don't remotely see the appeal in picking, say, Lae'zel and being a paragon of good.
Agreed. If you go for fixed characters, go all the way and have them have a distinct personality even as playable origins. So it makes full use of the "specific character" type of PC.