Fun Sorcerer Idea
I was reading the PHB, and I saw a line suggesting that a backstory for your character could be that you were an experiment by a lich.
So I had a funny idea. That’s your backstory, but this lich keeps turning up to see how their creation is progressing. I was thinking they would be a wizard in class, so there would be awkward scenes where the lich tries to teach the sorcerer how to be a wizard, and then gets frustrated when it of course doesn’t work.
Kinda a funny npc to pop up every so often when you level up a few. Maybe even a patron to the rest of the group.