Next to me you're all number two!
I don't know about templates for specific PC races, but I definitely know that sorcerous bloodlines were introduced in Pathfinder. I remember read those in the original Pathfinder beta and thinking that was the best idea ever. Like of course that's how that would work. And it definitely helps with the "Sorcerers are feared and mistrusted" thing when the sorcerer in question has demonic or draconic parts growing out of them, or any of the other weird stuff sorcerers get up to.