Evilhalfling said:Anyone else have suggestions?
Group them together however it makes sense to you, and then give us whichever ability mod makes the most sense in context.
For Sense Motive, I guess, I think there's a few different ways to catch people in lies and such. You can see their immediate reaction, if it's not what they make it out to be, if they're not practiced liars. Intelligence can help you figure out subtle untruths you wouldn't have otherwise noticed. Wisdom could help you note any subtle modulations of voice that indicate lies or truth, especially from people who aren't practiced liars. And Charisma could help you to get a person to hint at the truth to you, because they may believe you have the same goals they do.
I'm just saying: especially for the mental skills like this, the case could be made for any of the mental ability modifiers. The physical ones and the physical ability modifiers make some sense as well; I can see a skill needing strength in one circumstance but dexterity in another.
Just my two cents. Since you asked.