As for how many basic stats a RPG needs, I'd say none, like HeroQuest. The game can be just as enjoyable.
I don't really consider that an RPG, but now could be an intro to 4th edition with the tiles and stuff similar to the board used by Morcar (the DM) to lay things out for the minis to interact with.
It is very enjoyable still to this day, but getting harder to find pieces and spare copies. The expansions are near impossible to find. Anybody got any spare Chaos Warlocks or Fimirs laying around? Maybe some extra rats or bookshelves?
Game play itself isn't the only thing going on in an RPG, so that game play needs to be considered with the other stuff that's going on, and some balance struck where you want it to be for some overall experience.
That is why I left it up to the subjective view. For years I have been towing with writing my own RPG since I will never be as lucky as K&C to have AD&D rights....
So trying to find out exactly what people think about the stats direct connection to the game and what they mean to people as for being able to play.
I cannot really see a need for more direct stats, as the 5 D&D uses encompass just those 3 principles.
STR/DEX/CON are physical
INT/WIS are mental
CHA is social
While I can see CHA represents only something to help with the rules and allow for more player interaction with each other than with the mechanics in the form of roleplaying, and the physical are there to facilitate the thiings you cannot do for the character as a player, is there really a need for them to be defined and have so many fiddly bits and still play.
So would it be possible to play with the least number of fiddly bits, or do people want more fiddly bits to shape the character by the game mechanics?
Looking at 4th defenses, 3rds saves, and 2.5s extended abilities in the form of or similar to Reflex, Will, and Fortitude, they are still only 3 things, and two of them even cover the physical attribute, Reflex and Fortitude.
So how dependant is the gameplay on the ability scores, and could not a game have just those three and have all the flexibility of even 3rd edition?
Basically how much do you really rely on the ability scores when playing?
Are they all that defines your character and your actions with it within a game?
I want to here the subjective reasoning people have for the number of scores they prefer.