Nellisir
Hero
Yeah, I mean, I wasn't a complete pain (at least, not that I recall). The player was my cousin (and might have been living with me part of the time), and he had a tendency to try and creep in little extra stuff for his character. If he role-played an intimidation, I'd let it play out. It was when he said things like "I'm going to roll to intimidate him and get him to move" that I said no. There were other characters in the game who were built around charisma skills; he didn't get to have his schtick and theirs too.There would also have to be some really good role-playing to intimidate anyone.
Has no system tried including skills that are based on more than one stat? I think Hero system bases Stun on more than just Constitution (Where is my book?) - or is that Body? Couldn't some Performance skills be based on Charisma and Dexterity?
I know there are feats in the d20 system that allow a different stat bonus to be used for some things. But there need to be limits. I don't envy you, when you have to deal with such things.
I'm a specialist. I've played D&D, and nothing but D&D, for...crap, about 25 years. I haven't seen a good way of doing it within D&D. Other games might be able to.
It's all a trade-off. I try to be clear, fair, and not a jerk about what I allow and don't allow.