Imaro
Legend
That's the $64,000 question. The underlying mechanic has to support a range of flavoring, such that it can be destiny in one game, but something different in other games. I think you can read Conan as a destiny example, though I can also see cases made for other readings. That's why it is a playstyle thing.
Ideally, the flavoring would imply certain limits on the mechanic, but the mechanic would be broad enough to still have plenty left to pick from. That is, if you are playing Conan as "luck and the cynical inattention of the gods," then Conan ain't getting dipped in no magic river at birth. OTOH, his uncanny glare and reflexes from his early formative career is very much developed into a "heroic ability" later on, which would fit that playstyle.
I agree... I think this would definitely be an area where a page talking about reskinning the orign of the fighter's abilities and another with different examples possibly linked to genre or even literary characters would go a long way to accomplishing this.