For the adventure I've been writing for the last thousand years or so, a Tiefling hero and his Elven wife have a daughter who is basically a half-elf with just a few infernal traits (enough to make her VERY valuable some really bad people). But having read Elon's suggestion, I think I'll consider creating an elf/tiefling hybrid, that's much more interesting!
How come you find a mongrelman more interesting than a nice badass halfelven Vamp with horns (Green cats eyes eventually ? )
Sorry, I cannot resist to troll this thread so plz give me a laugh if you like it.