A real life DM would probably allow you a Intimidate (Str) check if you're threatening to do physical violence and looks capable of following through. I would like if it is was possible at character generation to chose between several Intimidates, one for Cha, one for Str, one for Int.
Yeah that was im talking about, there no DM ingame, so follow game restriction much simple decision is split roles. Brutal guy - intimidation str based and funny guy - Persuade cha based. Seems logical for me.
However the dialogue seems a bit dull at the moment (though I only just started). I hope, but I'm not optimistic, that the dialogue will become very interesting.
Right now dialogues is very much reminiscent of other CRPG, where almost everything can be solved by persuasion option. Not a big fan of this.