Hussar
Legend
Nonsense.
I find the argument that it is powergaming to play an Alexander the Great style fighter in 3e D&D with a decent fighter build instead of as a more powerful cleric or druid with pretty much any build to be faulty.
Diplomacy excellence mechanically as a nonresource allocation is simply a matter of whether a class has diplomacy as a class skill and how important charisma is to the class.
It is trivial for a paladin or a bard to be excellent at diplomacy without significant investment or sacrifice.
Rogues, clerics, druids, and monks, can be decent with no significant sacrifice because diplomacy is a class skill.
Fighters, barbarians, rangers, wizards, and sorcerers are poor at it as a default but can become mediocre by investing a bunch in their cross-class skill.
Should an Alexander the Great fighter, a Conan style barbarian, an Aragorn style ranger, or a Merlin or Gandalf type wizard or sorcerer, have to sacrifice and invest character power resources (ability point buy and feats) away from their class competencies to roleplay those character concepts correctly?
Is it preferential they play clerics and druids instead to effectuate these concepts so that they are powerful at combat and mechanically easily get high diplomacy modifiers? And not powergame or roleplay incorrectly.
Should fighters ideally be instead ars magica grogs, rangers be silent trackers, and wizards never be scheming advisors or meddle in matters of state?
Or, alternatively, choose systems which don't shoehorn classes so strongly into specific roles. In 4e, forex, a diplomatic fighter costs you exactly one feat out of your 15 (I think that's how many you get in 4e). So, it's not exactly a huge expediture of resources to gain that.
3e is a lot more difficult in that the classes are a lot more strongly walled in by the skill/feat system. But, again, certainly doable. The fighter takes the feat that gives him Diplomacy as a class skill and he's off to the races. No fuss no foul.
My problem is with the character, any character, who never bothers to spend any character resources and then expects to be treated as if he was much better than the character actually is.
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Funny how the "stat up this character" example gets entirely sidestepped. I didn't ask if it was point buy or a PC. Immaterial. Doesn't matter one whit.
Would you, or would you not give James Bond a 10 Cha? Yes or no?
The question is not, "Would you give him an 18 Cha", that's not the question. It's, "WOULD YOU GIVE JAMES BOND A 10 CHA, why or why not?"
The fact that everyone dodged the question pretty much proves my point I think. Portrayal of the character matters. A 10 Cha James Bond breaks immersion because the character is not portrayed as such. A 10 Int Einstein breaks immersion because we certainly wouldn't expect one of the greatest minds of all time to have an average Intelligence.
So, explain to me why you think that your 10 Cha character with no social skills should succeed at social encounters as often as the character with a 14 Cha and max ranks in Diplomacy.