To be honest, I don't think ability scores have much impact on how players roleplay. Nor should they, for the most part. I run a LOT of games, and players always come up with their character concept first. If getting a particular roll is inspiring for a player, that's awesome, but in practice I don't see that much. Except for intelligence, occasionally, and then it's usually predictable, and only done when convenient. Unless you're Travis Willingham...though even he broke character to have Grog come up with clever plans pretty regularly.