Neonchameleon
Legend
Let's assume Wisdom would reflect a character doing or avoiding reckless activities like jumping before looking, or rushing into fights before assessing the threat.
If i'm wiser than my PC, are you going to force me to do unwise things? Make me roll for it?
No. But I might give you incomplete information.
The same goes for Intelligence. Let's assume it covers the ability to solve problems and generate ideas.
If I am a really smart person and my PC has a low INT, are you going to limit what solutions I can make my PC do?
Am I going to have to roll for each solution I propose, to see if my PC can 'think' of it?
No. But when the wheels come off any plan you developed they are going to come off hard. And I'm less likely to provide advice on how the plan could be made to work.
Are you going to make me gullibly believe obvious falsehoods?
(Ignoring that this is normally Wis) no, but I'm not as likely to give you as many clues that falsehoods are as obvious.
If I am very charismatic and my PC is not, are you going to restrict the words I might say?
No. But if you try giving the St Stephen's Day Speech you may end up either laughed at or pelted with rotten vegetables whereas the cha 18 character would get the result he wanted.
Are you going to force mannerisms and ways of speech on my PC?
Of course not. But I am going to alter how they are taken. A high charisma character swaggering with a peacock feather in his cap may get emulated. A low charisma one is more likely to be laughed at.
Are you going to prevent me from saying something because my PC is not charasmatic enough to say it?
No. I can't think of any words people aren't charismatic enough to say. But chat up lines that would work for a Cha 16 character may well get a cha 8 character slapped.
What is still on the table though, is how I portray my PC. What actions he takes or is allowed to take.
If I have a 6INT/WIS/CHA are there actions that you would not let me attempt (which might require a skill roll and resolve itself in failure...)
No. But the influence they have will be different. (I'm exaggerating in the above for effect).