Charisma isn't looks or amiability. it isn't social graces. Charisma is force of personality. otherwise, Intimidate would be a Strength based skill. Now, how you play that strength (or weakness) is up to the individual, but suggesting that ugly or crude characters automatically have low Charisma scores is just silly. I agree with the depiction of a socially awkward, shy person as having low Charisma, simply because their personality doesn't shine through (for good or bad).
If the heroes all have low charisma scores, the world won't take them very seriously. they might not even believe they have done the things they claim to have done. After all, they are all meek, socially inept nobodies standing up there. If one member of the party has a high Charisma, then that persojn is likely going to be the face of the group and spokesperson, whether he wants to or not. If a number or all of the PCs have high chraisma scores, the world is going to take notice and their names are going to be known. But what they are known for, how they are viewed, is dependent upon their actions, not their scores.
If the heroes all have low charisma scores, the world won't take them very seriously. they might not even believe they have done the things they claim to have done. After all, they are all meek, socially inept nobodies standing up there. If one member of the party has a high Charisma, then that persojn is likely going to be the face of the group and spokesperson, whether he wants to or not. If a number or all of the PCs have high chraisma scores, the world is going to take notice and their names are going to be known. But what they are known for, how they are viewed, is dependent upon their actions, not their scores.