I'm gonna be weaker on the roleplay in my first playthrough, so I can see how much roleplay the game really allows and what I can get away with. From my second playthrough onwards I'll use that information to be more firm in my roleplay and play characters that the game won't overrule or block off.
One of the I ways I deal with getting overruled/blocked is to say "okay, this is clearly a decision the party are making as a group. What would the choice be if this were up for a vote?"