I don't know how to answer this without revealing my discarded wish-fulfillment Gary Stu self-insert.
Ah, screw it. I'm going for it.
I'd be a buff, white-haired, purple-eyed half-demon/half-angel with black feathered wings, gold horns, magical powers over light and shadows, the ability to communicate with animals, a pet dragon, a flaming sword AND trident, and I'd wind up in a polyamorous relationship with my main characters.
Would I have been a terrible character? Yes, I would, but it would have been fun to write! 