dmccoy1693
Adventurer
I don't see how a social system can encourage roleplaying. IN fact I think it does the opposite.
I like White Wolf's social combat system. You have your base roll (which can do as you described) but then you get bonuses if you do things like, actually give the speech you say your character is giving. Social combat shouldn't be used for just another conversation, but for swaying the hardest of hearts or changing the mind of someone firm in their belief.
If you are a terrible speaker IRL and are playing someone that is an excellent speaker in game, how are you going to ever convince someone of anything without some kind of system to mechanical system to represent the abilities of your character? Conversely, if you're an elequant speaker and you're playing someone that can't put two sentences together, how are you suppose to represent that limit in game terms? Won't you just frustrate the player that is playing the elequant character when your dumb character is doing all the convincing? The limit is the player in that case, not the character.
If I am swinging a sword ingame, I don't need to pick up a sword IRL and demonstrate my actions. I can describe it well, I can give all kinds of details of how I am taking my sword out of my sheath and letting it glisten in the sun for a split second before bringing it down to slice the goblin's head in two. But ultimately it is a roll that determines how well that was done. Conversely, if I want to convince the goblin captain to join our side I have to do the talking myself. I might forget a detail because its been 3 weeks in real life since some important detail was unearth, despite it being 3 days in game time. I might insult the goblin by asking it to go to dinner and serving it some meat that goblins avoid, that I would know in game but do not know out of game.
The limit of my character's abilities when swinging a dumb metal stick is my character's ability scores. The limit of my character's abilities when talking is my own speaking ability. At that point, I am not role playing, but am playing myself.