I mean, not unlike BG2 then, where you start a prisoner, get broken out, saved by a bunch of powerful wizards and so on and so forth.

Standard starting RPG tropes be standard RPG tropes.

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As for origin story being more interesting than PC, I think the issue here is that PC character is basically a FFA blank slate. I hope they might be able to spice it up a bit, but I'm not holding my breath that blank slate character's story will match fully developed origin companion with its own very well defined origin story spanning entire game.