EzekielRaiden
Follower of the Way
I meant to respond to this and forgot. The aforementioned story about our tiefling bard's heritage really couldn't work any other way. It has very expressly tied into an innate dark power, something that can last for thousands of years, and which can be passed from one person to another but only under special conditions. A simple curse wouldn't work, because the power itself isn't inherently bad/evil per se, and it wouldn't explain the apparent "cultivation" of the character's paternal bloodline that has gone on for so long. It also wouldn't explain how multiple supernatural entities inherently recognize the character as an authority over them because of something supposedly bad.I'm try to imagine any story I could not tell with core races, or even just a non-variant human. Having a hard time coming up with anything that's not just pretty inconsequential fluff. Want to struggle against a dark background like a tiefling? Your father was a serial killer and pirate, you have a tattoo on your chest and vague memories of a ritual promising your soul to dark powers. Want to be a cat person? You're PC is obsessed with cats or believes they are a cat that was polymorphed. Feel like an outsider? Easy enough to do through straight role playing.
I really did tailor this part of the story specifically to being a tiefling. Ironically, racism hasn't really been part of it! It's been all about "what am I really," authority over powers one finds detestable in concept but fascinating/fun/useful in practice, legacies hidden for centuries yet still directed by a single cunning mind, helping others shackled to that blood, etc.
As a somewhat different example: dragonborn, in the standard 4e cosmology, do not have a single creation myth for their race. The dragons favor the version that says that dragonborn were created simultaneously with dragons by Io, with dragons being the "greater" spirits and dragonborn the "lesser" spirits (implying that dragons rule, dragonborn serve.) Another tale says that dragonborn came from the scattered drops of Io's blood when he was slain by the primordial Erek-Hus; this may be interpreted as saying dragons are distinct and better, but it can easily be turned the other way, saying that dragonborn are semidivine. The last basically flips the first myth, saying Io created dragonborn first, and then created the dragons as mere engines of destruction; this was popular during Arkhosia's reign, but subversive since the nation was ruled by a dragon emperor (the Golden One, who basically ruled Dragon-Rome, complete with a founding confederation of seven city-states).
You...really can't have this same kind of story if you completely cut the "dragon" part out. I guess you could maybe have like, giants or something take their place? But that doesn't have nearly as strong a theme to it, I'd argue--you're definitely diluting things by choosing to use something that isn't dragons. And even then, you're still tying it to something not-human, it just happens to be "fantastically BIG human-like person" rather than "fantastical scaly flying flamethrower person." Likewise with the above tiefling story, you could maybe do something with like, a fey lord I suppose, but that's positing something that's definitely bigger and grander than just "player character elves."