Thornir Alekeg
Albatross!
I think willpower is based better on Wisdom than Charisma, if you take willpower to be self-control, as I do.Imho, Wisdom is pretty well-defined, it's just badly named _and_ used for some things that don't really relate to Wisdom at all.
Just calling it perception goes a long way of clearing things up. I don't see why it's also used to measure willpower. Imho, that's more a function of Charisma.
In other words, I think Charisma is really the ability that isn't well defined.
Charisma is primarily projected outward on others. Wisdom is generally internal.
Somebody who is very charismatic can influence others easily, but that does not necessarily mean they are not themselves susceptible to a very charismatic person. A high Wisdom allows the character to perceive the influence others are projecting on them and to resist that influence (I'm wise to your ploys).
Sadrik said:3.5 WIS skills
Spot
Listen
Survival
Profession
Heal
Sense Motive
4e adds:
Dungeoneering
Of the list, the only one I really have an issue with is Profession - too big a grouping to drop under one stat. Survival, Heal and Dungeoneering are on the edge - a good argument could be made that both INT and WIS are factors in those skills, but the D&D standard has been a to use a single stat, so I think WIS is the more appropriate choice from the intuitive/perception standpoint for Survival and Dungeoneering.
I would shift Heal more towards INT. While the "wisewoman" may have been a good healer, it was more application of accumulated knowledge (i.e. making poultices, using herbs etc.) than just perception of the illness or intuition of what to do (unless you're Gregory House, maybe).