I started as the apothecary since I've always like roleplaying as doctors in rpgs (fallout etc). His story is "alright" but holy shit his concocting gets so broken late game when you can give infinite BP to everyone on your team. In terms of storylines I think the hunter and scholar have standout ones. Both of them are fantastic. Great game all in all.
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Sweet Dreams!
http://www.youtube.com/user/AugustDreams